Have you ever heard a koala? In this short video from Discovery, we hear koalas yip, squeak, squawk, grunt, and munch. Adorable. Except the grunting, which is truly unsettling and borderline un-koala-like. Listen up:

If that's not enough, here are two more videos featuring grunting. Honestly, you don't want to mess with these guys. Behold:

Now that we've gotten that out of the way, let's never speak of it again.