11 of the Greatest Pranks of All Time

Rebecca O'Connell / istock
Rebecca O'Connell / istock

Think that time you filled your friend’s dorm room with hundreds of water-filled plastic cups was impressive? These large-scale pranks made headlines around the world—and will give you something to aspire to.

1. BBC ANNOUNCES THAT BIG BEN IS GOING DIGITAL.

In 1980, a BBC World Service news announcement reported that Big Ben would be given a digital display. Not only that, the iconic clock’s now-useless hands would be given away to the first four people who called in. While most people reacted with shock and anger, one Japanese seaman immediately called the station with hopes of claiming his prize.

2. AN ICEBERG APPEARS IN SYDNEY HARBOUR.

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On April 1, 1978, residents of Sydney, Australia, awoke to find a gigantic iceberg floating in Sydney Harbour. Days before the prank, electronics entrepreneur Dick Smith announced that an iceberg he had towed from Antarctica would be arriving in Sydney the following week (to give the exact date, he felt, would be a tip-off). And sure enough, there it was. The public was agog at the spectacle—the Australian navy even called Smith to ask if he needed help mooring his iceberg—until a rainstorm revealed the iceberg for what it truly was: A barge covered in sheets of white plastic and fire-fighting foam.

3. TACO BELL BUYS THE LIBERTY BELL.

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In 1996, Taco Bell tried to take corporate sponsorship to a whole new level by buying a bit of history. On April 1, the fast food chain took out full-page ads in six of the country’s biggest newspapers, including The New York Times, The Washington Post, and The Philadelphia Inquirer, announcing that "in an effort to help the national debt," it had purchased the Liberty Bell. According to the (fictional) bulletin, the Liberty Bell would remain available to the public but would split its time between Philly and Taco Bell's headquarters in Irvine, California.

Distressed calls (including from aides to two U.S. senators) to the National Park Service and Taco Bell headquarters prompted Taco Bell to issue a second—this time real—press release revealing the hoax and pledging to donate $50,000 for the Liberty Bell’s upkeep.

4. A BRITISH NEWS SHOW CONVINCES VIEWERS THAT SPAGHETTI GROWS ON TREES.

"It isn't only in Britain that spring this year has taken everyone by surprise," BBC current affairs program Panorama began a broadcast by saying in 1957. "Here in the Ticino, on the borders of Switzerland and Italy, the slopes overlooking Lake Lugano have already burst into flower, at least a fortnight earlier than usual. But what, you may ask, has the early and welcome arrival of bees and blossom to do with food? Well, it’s simply that the past winter, one of the mildest in living memory, has had its effect in other ways as well. Most important of all, it’s resulted in an exceptionally heavy spaghetti crop."

The three-minute segment included footage of Swiss spaghetti harvesters pulling the pasta off tree branches. Hundreds of Britons, many of who didn’t eat the Italian dish regularly, called the BBC to ask how they could grow a spaghetti tree of their own. Without missing a beat, the BBC replied, "Place a sprig of spaghetti in a tin of tomato sauce and hope for the best."

5. WISCONSIN STUDENTS MOVE LADY LIBERTY TO LAKE MENDOTA.

University of Wisconsin students Leon Varjian and Jim Mallon made a bold campaign promise in order to win election to the Wisconsin Student Association in 1978: They would bring the Statue of Liberty to Wisconsin’s Lake Mendota. The two won the election and, in February 1979, they set out to make good on their pledge. It took Varjian and Mallon three days—and $4000 of student fees—to assemble their Lady Liberty proxy out of plywood, chicken wire, papier-mâché, and muslin cloth and assemble it on the frozen lake.

This wasn’t Varjian’s first prank (although it may be his most time-consuming); in 1977 he petitioned to have the school named the "University of New Jersey" (Varjian’s home state) so that "students could go to a fancy East Coast school without moving." Mallon, on the other hand, would go on to create the cult comedy television show Mystery Science Theater 3000.

6. MIT STUDENTS BUILD A GIGANTIC GAME OF TETRIS.

Students at MIT devised the idea of turning the 295-foot tall Green Building on campus into a larger-than-life, playable Tetris game in 1993—and in 2012, they finally made it a reality. It took the hackers four years of planning and two months of sleepless nights in order to construct what the MIT student newspaper The Tech called the "holy grail of hacks." Through a complicated system of wirelessly controlled LED lights, the talented engineers transformed 153 of the building’s windows into the falling colored blocks, which were controlled by players at a podium.

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During "The Great Rose Bowl Hoax" of 1961, Caltech students orchestrated a surprise for the University of Washington Huskies during their halftime card stunt show (in which people in the stands used signs to spell out messages of support for their team). A crafty group of Caltech students broke into the dorm housing Washington’s cheerleaders and changed each of their thousands of instruction note cards. During halftime, the prank went off without a hitch: When the Huskies fans flipped their signs over, they spelled out "Caltech." The prank made national news.

The best part of the mischief? Caltech doesn’t even have a football team. The Huskies were playing the University of Minnesota in that Rose Bowl game.

8. NIXON ANNOUNCES HE'S RUNNING FOR RE-ELECTION.

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In 1992, National Public Radio’s Talk of the Nation reported that Richard Nixon, who resigned in 1974 following the Watergate Scandal, had declared his candidacy for the Republican presidential nomination. To corroborate their story, NPR played a clip of Nixon declaring his intention to run and claiming, "I never did anything wrong, and I won't do it again."

As is the way of these things, callers flooded NPR with questions and cries of outrage. It wasn’t until the second half of the program that host John Hockenberry revealed that the whole broadcast had been an April Fools' Day joke. Comedian Rich Little—nicknamed "The Man of a Thousand Voices"—was responsible for "Nixon’s" speech.

9. SWEDISH NEWS STATION CONVINCES READERS THAT STOCKINGS CAN TURN THEIR BLACK-AND-WHITE TVS TO COLOR.

A 1962 April Fools' Day broadcast from what was then Sweden’s only television network, SVT, told viewers that they would be able to see the normally black-and-white broadcast in color… if they had the right materials.

"Technical expert" Kjell Stensson explained to viewers, in highly scientific details, that if they stretched a pair of nylon stockings over their television sets, the light would be filtered in such a way as to allow them to see the broadcast in color. To best see the results, Stensson recommended, viewers would need to move their heads from side to side as they watched. Needless to say, the thousands of viewers who fell for the hoax looked a little bit silly.

10. AN EASTER ISLAND FIGURE WASHES ASHORE IN THE NETHERLANDS.

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While Swedes were covering their TVs with stockings, the Dutch thought an iconic landmark had washed upon their shores. On March 29, 1962, a man walking on the beach near Zandvoort, Netherlands, found what he could only identify as an Easter Island statue. A few days later, on April 1, an expert flew in from Norway to inspect the figure and declared that it was indeed an authentic artifact, carried from the South Pacific to Europe. The statue was put on display in the town’s center for all to see.

By day’s end, the sculpture’s creator, a Dutch artist named Edo van Tetterode, had come clean and confessed to planting the "artifact" on the beach. The following year, Tetterode founded the National April 1st Society, and, in a tradition that would carry on until his death in 1996, awarded a small bronze Easter Island head trophy to the perpetrator of the year’s best prank.

11. ALABAMA CHANGES THE VALUE OF PI.

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The Alabama state legislature forever changed math, science, and the world as we know it in 1998, when it declared that the mathematical constant pi would now be valued at 3.0, instead of the usual 3.14159—or so claimed the April issue of the New Mexicans for Science and Reason newsletter. In a story by April Holiday for the "Associalized Press," experts argue for and against Alabama’s radical change, which was said to be made because 3.0 is a "biblical value." The story quickly went viral—email existed in 1998, you guys!—but no one knew the real extent of the hoax’s success until Alabama legislators began receiving hundreds of calls in protest.

This story originally ran in 2015.

8 Tips for Interviewing a Serial Killer, According to Famed FBI Profiler John Douglas

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iStock/Kritchanut

Over the course of his career, former FBI agent and behavioral analyst John E. Douglas has interviewed criminals ranging from repeated hijacker Garrett Trapnell and cult leader Charles Manson to serial killers Edmund Kemper (a.k.a. the Co-Ed Killer) and Dennis Rader (a.k.a. B.T.K.). In his new book, The Killer Across the Table, Douglas takes readers into the room as he interviews four very different offenders.

In these conversations, “I'm trying to gain [their] trust [to get] information that I'll be able to apply to current cases,” Douglas tells Mental Floss. Here, he outlines how he prepares for an interview with a killer to figure out what makes them tick.

1. Never go into an interview cold.

“Preparation is the number one factor for a successful interview” of this kind, Douglas says. “Before I go in to do an interview, [I] go back into the files and fully look at the case that got him or her incarcerated to begin with. Which means looking at the police reports, the preliminary protocol that the medical examiner did regarding the autopsy, autopsy photographs, and then looking in the corrections reports as well. You want to be totally armed with the case when you go in.”

2. Memorize everything—don’t use notes or a tape recorder.

Early on in his interviews with killers, Douglas used a tape recorder, which he now says was a mistake. “You're dealing with very paranoid individuals. They don't trust you, they don't trust the [corrections] system,” he says. “If my head is down, [they’ll ask], ‘What, are you taping this? Why are you writing these notes down?’” Memorizing the case is key—when he goes in, he won’t have notes or a tape recorder: “It's going to be key [for] me to maintain some eye contact with them.”

3. Make sure the environment is right.

The key in these interviews, Douglas says, is to make the environment feel open so that the killer feels comfortable and like he’s in control. “When you go into a prison, sometimes you're forced to deal with what you've got,” he says. “But if I have time, I try to [make arrangements] depending on the personality.”

Douglas prefers to conduct his interviews at night, relying only on low table lights to create a soothing, stress-free atmosphere. Douglas will even think about seating arrangements. “If I'm dealing with a real paranoid type of individual, I need to put this person near a window—if there's a window—so that he can look out the window and psychologically escape, or I may have him face a door,” he says. Both Charles Manson and Richard Speck chose to sit on the backs of their chairs so they could look down on him. Douglas’s attitude is: “You hate me. I know you hate me, but go ahead and do it. I'm just trying to get a little bit of information now.”

4. Don’t rely on what a killer tells you.

Douglas never takes a killer’s word for anything, which is why memorizing the case is so important. Typically, he knows the answers to the questions he’s asking, and it allows him to call out the offender if he or she lies. “If you don't look deeply into the material, you don't know who in the heck you're talking to,” Douglas says. “You're talking to somebody who's pulling the wool over your eyes … If [an interviewer relies] on self-reporting, they're going to be filled with a lot of lies coming from the person they're interviewing.”

5. Know that this is not an interrogation.

Once he knows who’s committed a crime, Douglas says, his main goal is to find out what motivated them. The best way to get that out of them is to ask his questions “in a very relaxed kind of a format, making the subject—even if it's a guy like Manson or some of the worst killers you'd ever want to meet—feel real comfortable and feel at the same time that they are controlling me during the interview.”

What Douglas ultimately tries to do is have a conversation with the offender. “That means if they're asking me a lot of questions about myself, about maybe my family, my job, and I'm pretty honest with them,” he says. “They will trust me and open up to me as long as they know that I know the case, backwards and forwards. If they start fudging on the case trying to send me down the wrong path, I will confront them, but not in mean [way]. I'll laugh and say, ‘Look, come on. I know what you did. What are you doing here?’ That’s how you gain their trust.”

6. Be mindful of your body language—and the actual language you’re using.

When he’s in an interview, Douglas isn’t sitting there with his arms crossed, looking uncomfortable. “The body language should be just relaxed, not a defensive kind of posture,” he says. “[It should be] very comfortable—like on a date kind of thing.”

Douglas also avoids words like killing, murder, and rape, and, as awful as it might sound, avoids placing the blame on the killer. “I'm trying to get him to talk so we're going to project the blame," Douglas says. "[Some killers] use this projection, never accepting responsibility, not admitting that it was free will, that they had the ability to make choices and they made the wrong choices in their lives, even though they may have come from a very, very bad background.”

This kind of approach is what helped Douglas gain insights from Ed Kemper. When Douglas asked how Kemper—who was 6 feet, 9 inches tall and 300 pounds—would get young women in his car, Kemper revealed that he would pull up next to them and look at his watch, which would give them the impression that he had somewhere to be. “I’ll go with this guy. He’s got an appointment, nothing’s going to happen to me,” Douglas says. “Just a little thing like that was real helpful to me.”

7. Play it cool, no matter what happens.

Being confrontational is no way to get a killer to open up. “In an interview, whether it's a serial killer or any type of violent offender, I'll never challenge them or be negative toward them,” Douglas says. “I'll never do anything like that. If I feel that they're not being truthful, I'll bring it to their attention. But I’m on a fact-finding mission. There are several shows on television right now where celebrity types are going into prisons doing interviews. They get in the guy's face and they call him a liar. [So] the guy, what does he want to do? ‘I want to go back to my cell. Screw you. I'm out of here.’ And you can't hold him there—he's got to go back. So, you never do anything like that.”

8. Don’t be afraid to feign empathy.

Sometimes getting what you need out of an offender means fudging the truth. Sometimes Douglas will tell the killer that he’s earning points with the warden by doing the interview. “There's still always this glimmer of hope that they'll get out of prison one day, even if they're in there for multiple murders,” he says. “The warden doesn't give a damn about him, but I'm just telling them this to try to get him to speak up.”

Sometimes Douglas will play to his subject's pride and narcissism. “They want to be the big daddy,” he says. "'But I'm the main guy, right? You're doing this research and you guys got the real McCoy here. I'm the best and the worst of the worst.'" And sometimes, he feigns empathy—all with the goal of finding out information that will help prevent and solve other crimes.

"Let the person feel they are in control of the interview,” Douglas says. "Be open with yourself. Give them information about yourself to this person and it should go well."

14 Secrets of McDonald's Employees

Justin Sullivan, Getty Images
Justin Sullivan, Getty Images

While there’s virtually no end to the number of fast food options for people seeking a quick meal, none have entered the public consciousness quite like McDonald’s. Originally a barbecue shop with a limited menu when it was founded by brothers Richard and Maurice McDonald in the 1940s, the Golden Arches have grown into a franchised behemoth with more than 36,000 locations worldwide.

Staffing those busy kitchens and registers are nearly 2 million McDonald's employees. To get a better idea of what many consider to be the most popular entry-level job in the nation—staff members on the floor make an average of $9 an hour—we asked several workers to share details of their experiences with errant ice cream machines, drive-through protocols, and special requests. Here’s what they had to say about life behind the counter.

1. McDonald's employees can't always deliver fast food all that fast.

While McDonald’s and other fast-service restaurants pride themselves on getting customers on their way, some menu items just don’t lend themselves to record service times. According to Bob, an assistant store manager at a McDonald’s in the Midwest, pies take an average of 10 to 12 minutes to prepare; grilled chicken, 10 minutes; and biscuits for Egg McMuffins, eight to 10 minutes. In the mood for something light, like a grilled chicken and salad? That will take a few minutes, too. Bob says salads are pre-made with lettuce but still need to have chicken and other ingredients added.

The labor-intensive nature of assembling ingredients is part of why the chain has more recently shied away from menu items with too many ingredients. “We are trained to go as fast down the line as we can, and if we have to stop to make something that has 10 ingredients, it tends to slow things down,” Bob tells Mental Floss. “Corporate has realized this and has taken many of these items off in recent years, [like] McWraps, Clubhouse, more recently the Smokehouse and mushroom and Swiss and moved to items that can go a lot quicker.”

2. McDonald's workers wish you’d stop asking for fries without salt.

A serving of McDonald's French fries is pictured
Joerg Koch, AFP/Getty Images

A common “trick” for customers seeking fresh fries is to ask for them without salt. The idea is that fries that have been under a heating lamp will already be salted and that the employee in the kitchen will need to put down a new batch in the fryer. This does work, but customers can also just ask for fresh fries. It’s less of a hassle and may even save employees some discomfort.

“People can ask for fresh fries and it's actually way easier to do fresh fries rather than no-salt fries,” Andy, an employee who’s worked at three different McDonald’s locations in the Midwest, tells Mental Floss. “For those, we have to pour the fries onto a tray from the fryer so they don't come in contact with salt. It can get awkward sometimes getting everything into position, especially if you have a lot of people working in close proximity and it's busy, so I've had some scalded hands a couple of times trying to get fries out in a timely way.”

3. McDonald's workers have to pay careful attention to the order of ingredients.

McDonald’s is pretty specific about how their burgers and other items are supposed to be assembled, with layers—meat, cheese, sauce—arranged in a specific order. If they mess it up, customers can notice. “In some cases it has a big impact,” Sam, a department manager and nine-year veteran of the restaurant in Canada, tells Mental Floss. “Like placing the cheese between the patties with a McDouble. If they don’t put the cheese between the patties, the cheese won’t melt.”

4. There’s a reason McDonald’s employees ask you to park at the drive-through.

A McDonald's customer pulls up to the drive-thru window
Tim Boyle, Getty Images

After ordering at the drive-through window, you may be slightly puzzled when a cashier asks you to pull into one of the designated parking spots. That’s because employees are measured on how quickly they process cars at the drive-through. If your order is taking a long time to prepare, they’ll take you out of the queue to keep the line moving. “My store has sensors in the drive-through that actually tell us exactly how long you are at each spot in the drive-through,” Bob says. “We get measured based on something we call OEPE. Order end, present end. [That measures] from the second that your tires move from the speaker until your back tires pass over the sensor on the present window. My store is expected to be under two minutes.” If an order will take longer than that, you'll be asked to park.

5. The McDonald's drive-through employees can hear everything going on in your car.

While the quality of the speakers at a drive-through window can vary, it’s best to assume employees inside the restaurant can hear everything happening in your car even before you place an order. “The speaker is activated by the metal in the car, so as soon as you drive up, the speaker turns on in our headset,” Andy says. “We can hear everything, and I do mean everything. Loud music, yelling at your kids to shut up, etc.”

6. The employees at McDonald’s like their regulars.

Customers eat inside of a McDonald's with an order of French fries in the foreground
Chris Hondros, Getty Images

With hot coffee, plenty of tables, Wi-Fi, and newspapers, McDonald’s can wind up being a popular hang-out for repeat customers. “[We have] a ton of regulars who come into my store,” Bob says. “I'd say at least 75 percent of my daily customers know us all by name and we know them all, too. It makes it nice and makes the service feel a lot more personal when a customer can walk into my location, and we can look them in the eye and say, ‘Hey Mark! Getting the usual today?’ and we've already started making his coffee exactly how he takes it.”

7. McDonald’s staff get prank calls.

Unless they’re trying to cater an event, customers usually don’t have any reason to phone a McDonald’s. When the phone rings, employees brace themselves. In addition to sometimes being asked a legitimate question like when the store closes, Sam says his store gets a lot of prank calls. “Sometimes it’s people asking about directions to Wendy’s,” he says. “A lot of inappropriate ones. Most are pretty lame.”

8. For a McDonald’s worker, the ice cream machine is like automated stress.

A McDonald's customer is handed an ice cream cone at the drive-thru window
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The internet is full of stories of frustrated McDonald’s customers who believe the chain’s ice cream machines are always inoperable. That’s not entirely true, but the machine does experience a lot of downtime. According to Bob, that’s because it’s always in need of maintenance. “The thing is, it is a very sensitive machine,” he says. “It's not made to be making 50 cones in a row, or 10 shakes at a time. It takes time for the mix to freeze to a proper consistency. It also requires a daily heat mode, [where] the whole machine heats up to about 130 degrees or so. The heat mode typically takes about four hours to complete, so you try to schedule it during the slowest time.” Stores also need to take the machine entirely apart every one to two weeks to clean it thoroughly.

Bob adds that the machine’s O-rings can crack or tear, rendering the unit inoperable. Seasoned workers can tell if a unit is faulty by the consistency of the shakes or ice cream coming out, and sometimes by the noises it makes.

9. McDonald's employees don't mind if you order a grilled cheese.

Contrary to rumor, there’s no “secret menu” at McDonald’s. But that doesn’t mean you can’t sometimes snag something not listed on the board. Andy says a lot of people order a grilled cheese sandwich. “I've made many a grilled cheese before,” he says. But it’s not without consequences. “Sometimes it can get a bit risky doing it because the bun toaster wasn't designed to make grilled cheeses so sometimes you get some burnt buns or cheese or the cheese sticks inside and it slows down the other buns from getting out on time so that causes more burnt buns.”

Another common request is for customers to ask for a McDouble dressed as a Big Mac, with added Big Mac sauce and shredded lettuce. “I think [it’s] a way more practical way to eat a Big Mac since there's less bun in the way, and it's also way cheaper even if you do get charged for Mac sauce.”

10. McDonald’s workers recommend always checking your order.

A McDonald's employee serves an order
Justin Sullivan, Getty Images

Nothing stings worse than the revelation that an employee has forgotten part of your food order. Contrary to popular belief, it’s not because the employees are being lazy or inattentive. According to Bob, it’s simply due to the volume of customers a typical location has to process in a given day. “We are human,” he says. “Mistakes do happen. We always feel terrible when they do but when we serve 1000-plus people a day, it's bound to happen.”

Bob recommends checking your bag before leaving the restaurant and not taking it personally if there’s an issue. “Be nice to us if you have a problem,” he says. “It's a huge difference between coming to us and saying, ‘Hey, I seem to be missing a fry from my bag,’ and ‘You bastards didn't give me my fries!’” If you want to check your bag at the drive-through, though, he recommends trying to pull ahead so cars behind you can move forward.

11. McDonald's employees don't recommend the grilled chicken.

If a menu item isn’t all that popular, it can wind up experiencing a low rate of turnover. Of all the food at McDonald’s, the most neglected might be the grilled chicken. Because it doesn't move quickly, workers find that it can turn unappetizing in a hurry. “That stuff has a supposed shelf life of 60 minutes in the heated cabinet, but it dries out so quickly that even if it's within an acceptable time frame, it looks like burnt rubber, and probably tastes like it, too,” Andy says.

12. Golden Arches employees aren’t crazy about Happy Meal collectors.

A McDonald's Happy Meal is pictured
David Morris, Getty Images

Happy Meals are boxed combos that come with a toy inside. Usually, it’s tied into some kind of movie promotion. That means both Happy Meal collectors and fans of a given entertainment property can swarm stores looking for the product. “The biggest pain involving the Happy Meals is the people who collect them,” Bob says. “I personally hate trying to dig through the toys looking for one specific one. We usually only have one to three toys on hand. It's especially a pain in the butt during big toys events such as the Avengers one we just had. There was like 26 different toys, and some customers get really mad when you don't have the one that they want.”

And no, employees don’t usually take home leftover toys. They’ve saved for future use as a substitute in case a location runs out of toys for their current promotion.

13. McDonald's employees can’t mess with Monopoly.

The McDonald’s Monopoly promotion has been a perennial success for the chain, with game pieces affixed to drink cups and fry containers. But if you think employees spend their spare time peeling the pieces off cups looking for prizes, think again. Following a widely-publicized scandal in 2000 that saw an employee of the company that printed the pieces intercepting them for his own gain, the chain has pretty strict rules about the promotion. “Monopoly pieces and things like them get sent back to corporate,” Bob says. “We aren't allowed to touch them, open them, or redeem them as employees.”

14. One McDonald's worker admits there have been sign mishaps.

A McDonald's sign is pictured
Tim Boyle, Getty Images

Many McDonald’s locations sport signs under the arches advertising specials or promotions. Some are analog, with letters that need to be mounted and replaced. Others have LED screens. Either way, there can be mistakes. “I've never seen anyone mess around with the letters,” Andy says. “But I do remember one time we were serving the Angus Burgers and the ‘G’ fell off of the word ‘Angus.’ Good times.”

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