12 Behind-the-Scenes Secrets of Private Investigators


In the movies, private investigators are often depicted as gun-toting outlaws who get results the police can’t by knocking down doors and shaking down suspects. In reality, licensed PIs don’t usually have to nurse any broken knuckles. They tackle insurance fraud, infidelity, and corporate impropriety by diligently combing through records and trailing persons of interest, using experience garnered from backgrounds in law enforcement, loss prevention, or the military.

That doesn’t mean they don’t have to occasionally go undercover, or think fast when they’ve been spotted. Check out these 12 lesser-known facts about what it's like to be a detective for hire.


Slipping into a new job for investigative purposes isn’t limited to law enforcement. Jordan Smith, founder and chief investigator at Hyperion Investigative Consulting in Broomfield, Colorado, says his firm frequently pursues cases relating to corporate or business fraud by getting one of their PIs hired at the company to see what’s going on. “If you’re a company with a retail location that’s missing deposits, we can go in and see what’s happening for ourselves,” he says. “Right now, we have someone at a hospital to see who might be stealing prescription drugs. Sometimes we can send a certified fraud examiner to work as an accountant.” The best part? “We can get paid the employee rate as well as for the investigative work we do.”


Online dating has been a boon for PIs: people intertwined in internet romances sometimes begin to have suspicions about whether the person they’re corresponding with is telling them the truth. “They’re wondering if the person is who they say they are,” says Brendan Burke, a PI with Gilliam Burke Investigations in Edmonton, Alberta. “It gets to the point where they begin asking for money. We had one case where someone was claiming he owned businesses and properties he didn’t. Typically, the client is an older woman who’s divorced and looking for attention. They want to believe. But if you think you’re being scammed, you probably are.”


A key element of surveillance work—typically done to observe behavior like infidelity, or unwarranted physical exertion in the case of worker's compensation—is remaining undetected. That means not getting out of a parked car constantly, and handling personal business during a typical 12-hour spy shift any way you can. When it comes to bathroom behavior, Smith says, “You need to go before you get there. But we’ll bring a pee bottle.”

For number twos? “We just hold it. I’ve never not held it.”


Despite having a wealth of information available both online and at public records locations, detectives sometimes find their best resource is a trash can. “Once something is thrown away, we can collect it,” Burke says. “It depends on your local municipality. But we’ve had success with it. With one child custody case, we were able to find evidence of drug use—crack pipes and powders.” And yes, it’s gross. “We use face masks with some Vicks rubbed into it.”


For intel, nothing beats "friending" a case subject on Facebook. Since subjects probably won’t accept a request from a PI, some opt for creating fake accounts. “It’s safe to say most of us have a few different accounts,” says Skyler Crowley, a private investigator in Florida. “Some guys like blondes, some guys like redheads. Whatever gets us in. My fake accounts are exponentially more popular than me.”


Depending on their location, it might be permissible for PIs to get access to your bank accounts—not to manage your funds, but to find out exactly how much money you have to see if you might be withholding assets during a divorce or other litigation. “It’s a trade secret, but we do have ways of finding out where someone has an account and how much money is in it,” Smith says. “It’s generally not admissible in court, but it’s info we’re allowed to give to attorneys.”


Every so often, someone will confuse Burke for a Ghostbuster. “The most unusual request, I think, was from someone who thought their TV was haunted,” he says. “That’s … well outside of what we do.”


Having a social media profile is probably bad news if you’re trying to stay off a PI’s radar. “It’s a gold mine of information,” Smith says. “People like to document their entire life. I’ve seen people who were supposedly ‘injured’ at work posting pictures of exercising. I’ve also been able to figure out what vehicles a person owns because of photos online.” And remember, even when you delete something it might still be retrievable. “Nothing just goes away,” Smith says.


Non-paranoid people aren't generally suspicious of someone following them, but there’s a good way to avoid detection when PIs want to track a car on the road. “When we have to follow people, we use two drivers,” Smith says. “That way, they’re not seeing the same car behind them all the time.”


Sometimes PIs get hired for jobs without getting the full story. “One guy called me at midnight for me to do surveillance that night on his house because he was out of town and his teenage daughter was home alone,” Cowley says. “I thought it was very weird and last minute but I wasn't going to turn down the job. He called me every 10 minutes until 4 am. Eventually he asked me to get out of the car and sneak up to the windows to see if another man was with his daughter. That's when I realized something more was going on there. It turns out the man was separated from his wife and was extremely jealous of her new boyfriend. He wanted me to watch them. I said no.”


Some PIs have a good enough rap to convince some of your associates that informing on you is in their best interests. Once, Smith was having trouble getting information on a woman who had custody of her children and spent most of her day in her apartment. “I was able to convince her landlord to call me two to three times a day with information,” Smith says. “It resulted in custody going to the father.”


Some detectives might not tell you they’re detectives, using terms like “legal investigator” instead to help ward off any stereotypes from pop culture. “Some PIs I know don't like to use the term because there’s a certain image of being shady, like a Philip Marlowe character,” Burke says. “But I find that most people think it’s interesting. It’s nothing I shy away from. I operate legally and ethically, and I’m proud of the work that I do.”

All images courtesy of iStock.

12 Secrets of Roller Coaster Designers

People ride a spinning roller coaster in the Santa Cruz Beach Boardwalk Park
People ride a spinning roller coaster in the Santa Cruz Beach Boardwalk Park
hanusst/iStock via Getty Images

Back in the early 20th century, engineers attempting to push the limits of roller coaster thrills subjected riders to risky upside-down turns and bloody noses. A century later, coaster designers rely on computer software, physics, and psychology to push the limits of the roughly 5000 rides in operation worldwide. To get a sense of what their job entails, Mental Floss spoke with several roller coaster specialists about everything from testing rides with water-filled dummies to how something as simple as paint can influence a coaster experience. Here’s what we learned.

1. Getting strapped in might be the most exciting part of the roller coaster ride.

Known as a “thrill engineer,” UK-based Brendan Walker consults with coaster manufacturers and parks on the psychology of riding the rails. In his experience, riders getting secured into their seats are at the peak of their excitement—even more so than during the ride itself. “The moment the lap bar is being locked down and you have that feeling of things being inescapable, that you have to suffer the effects of the ride, is the highest moment of arousal,” Walker says. “The actual ride might only achieve 80 percent of that excitement.”

2. Designers test roller coasters with water-filled dummies.

Bill Kitchen, founder of U.S. Thrill Rides, says it can take anywhere from two to five years for a coaster to go from idea to execution. Part of that process is devoted to the logistics of securing patents and permits for local site construction—the rest is extensive safety testing. “We’re subject to ASTM [American Society for Testing Materials] standards,” Kitchen says. “It covers every aspect of coasters. The rides are tested with what we call water dummies, or sometimes sandbags.”

The inanimate patrons allow designers to figure out how a coaster will react to the constant use and rider weight of a highly trafficked ride. The water dummies—which look a bit like crash test dummies, but filled with water—can be emptied or filled to simulate different weight capacities. Designers also sometimes use the kind of crash-test dummies found in the auto industry to observe any potential issues prior to actual humans climbing aboard.

3. Every foot of roller coaster track costs a lot of money.

Thrill seekers go upside-down while riding on the Mind Eraser roller coaster in Agawam, Massachusetts
Thrill seekers go upside-down while riding on the Mind Eraser roller coaster in Agawam, Massachusetts
Kirkikis/iStock via Getty Images

There is absolutely nothing random about the length of a coaster’s track. In addition to designing a ride based on the topography of a park site, designers take into account exactly how much space they’ll need to terrorize you and not an inch more. When England’s Alton Towers park was preparing to build a ride named TH13TEEN for a 2010 opening, they asked Walker exactly how much of a drop was needed to scare someone in the dark. “It was a practical question,” Walker says. “For every extra foot of steelwork, it would have cost them £30,000 [roughly $40,000].”

4. Rollercoaster Tycoon brought a lot of people into the business.

The popular PC game, first released in 1999, allowed users to methodically construct their own amusement parks, including the rides. As a proving ground for aspiring engineers and designers, it worked pretty well. Jeff Pike, President of Skyline Attractions, says he’s seen several people grow passionate about the industry as a direct result of the game. “I remember when the game first got popular, I would go to trade shows and there would be kids looking to get into it using screen shots of rides they designed. The game definitely brought a lot of people into the fold.”

5. Paint makes a big difference in coaster speed.

A group of tin metal cans with colorful paint
scanrail/iStock via Getty Images

For all of their high-tech design—the software, fabrication, and precise measures of energy—a good coaster ride can often come down to whether it’s got too much paint on it. “The one thing that will slow down a steel coaster is a build-up of paint on the track rails,” Pike says. “It softens where the wheel is rolling and hitting the track, which increases the drag.” A good, worn-in track will have gray or silver streaks where the wheel has worn down the paint, making it move more quickly.

6. A roller coaster’s skyline is key.

Brian Morrow, former Corporate Vice President for Theme Park Experience at SeaWorld Parks and Entertainment, says that the looming curvature of coasters spotted as guests drive toward and enter the park is very purposeful. “It’s like a movie trailer in that we want you to see some iconic coaster elements, but not the whole thing,” he says. “You approach it with anticipation.”

7. Some coasters arrive as giant model kits.

Whether a coaster’s theme or design comes first is largely left up to the end user—the amusement park. But for some rides, manufacturers are able to offer pre-fabricated constructions that designers can treat like the world’s biggest Erector Set. “Sometimes I work on rides that have already been built,” Walker says. “They’re produced by a company and presented almost like a kit with parts, like a model train set. There’s a curve here, a straight bit here, and you can pick your own layout depending on the lay of the land.”

8. Wooden roller coasters are weather-sensitive.

If you’ve ever been on a wooden coaster that seems a little shaky from one trip to the next, check the forecast: It might be because of the weather. Pike says that humidity and other factors can shrink the wood, affecting how bolts fit and leading to a slightly shakier experience. “The structure itself can flex back and forth,” he says. It’s still perfectly safe—it just takes more maintenance to make sure the wood and fasteners are in proper operating condition. A well-cared-for wooden coaster, Pike says, can usually outlast a steel model.

9. The time of day can affect the coaster experience.

“A coaster running in the morning could run slower when cooler,” Morrow says. “The wheels are not as warm, the bearings are warming up. That could be different by 2 p.m., with a slicked-up wheel chassis.” Coasters experiencing their first-ever test runs can also be slightly unpredictable, according to Pike. "Those first trial runs [during the testing phase] can be slow because everything is just so tight," he says. "A lot of coasters don't even make it around the track. It's not a failure. It's just super-slow."

10. Roller coaster designs can come from unusual places—like Jay Leno’s chin.

The twisting, undulating tracks of coasters can often be the result of necessity: Pike says that trees, underground piping, and available real estate all inform designers when it comes to placing a ride in a specific park. But when they have more freedom, coasters can sometimes take on the distinctive shape of whatever happens to be around the designers at the time of conception. “We had a giant piece of land in Holland that just had no constraints, and we were sitting around talking," Pike says. “And we started talking about Jay Leno’s chin.” The ride was a “loose” representation of the comedian's jaw, but “it is there.”

11. Roller coaster riders double as performers.

A woman taking a ride on a rollercoaster at Oktoberfest in Munich, Germany
A woman taking a ride on a rollercoaster at Oktoberfest in Munich, Germany
exithamster/iStock via Getty Images

For Walker, the best advertising for a coaster is having spectators watch riders de-board after an exhilarating experience. “It’s all about that emotion,” he says. “A spectator basically asks, ‘What’s making them so aroused? What’s giving them such pleasure?’ The line for the ride is the audience. Imagining yourself on the structure becomes a very powerful thing."

12. The future of coasters is vertical.

Biggest, fastest, longest—coasters are running out of superlatives. Because rides can only be designed with so many drips, rolls, or G forces, some companies are looking to the sky for their next big idea. Kitchen has been overseeing design of the Polercoaster for years: It’s a sprawling, skyscraper-esque ride that uses electromagnetic propulsion to carry riders upwards instead of across horizontal tracks. “We want to put it in places where land is very expensive, like the Vegas strip,” he says. “You can only do that if it takes up a lot less space.” The project is set to exceed the 456 feet of the current tallest ride, Kingda Ka at Six Flags in New Jersey. “It’ll be the world’s tallest—and hopefully the most fun.”

This list first ran in 2017.

Here's Why You Should Always Tip Your Delivery Driver With Cash

Khosrork/iStock via Getty Images
Khosrork/iStock via Getty Images

In our microchip- and app-happy society, we’ve all but abandoned paying for things in cold, hard cash. And while that’s almost definitely more efficient for you, it could be costing your delivery driver their tip, Lifehacker reports.

Some food delivery services guarantee a minimum payment for their drivers, which seems like a good thing on the surface. Basically, the company will pay the driver the agreed-upon base payment, even if it’s a slow shift and they don’t actually reach that amount in delivery charges. But it also means that everything they earn, including tip, is going toward that base payment. In other words, your tip is saving the company from having to pay more of the base payment.

The best way to ensure that your tip goes into your driver’s pocket is to give them a tip that they can literally put in their pocket—namely, cash. If you don’t have cash around or like to keep your finances digital for credit card rewards or tracking purposes, you should choose a delivery service that promises to pay their employees the full amount of whatever they earn, including tip.

Take a look at Lifehacker’s handy breakdown below to find out which delivery services you can trust with your tips, and read the policy details for each service here.

Delivery Services That Give Tips Directly to Drivers


Delivery Services That Keep Drivers’ Tips for Base Payment

Amazon Flex

Keep in mind that this is only for companies whose whole business is based on being the go-between for you and your favorite restaurant. If you’re ordering directly from a restaurant, make sure to ask about its own delivery rules, or just tip in cash to be safe.

[h/t Lifehacker]