We've seen so many daredevils pulling amazing stunts, it can be all too easy to forget just how dangerous some of them are. But thanks to Travis Pastrana - who we previously saw do this - we just remembered.
That's because the 27-year-old recently broke his foot while trying to complete a ludicrous-looking spin/jump thing on his bike at the ESPN X Games.
While it all looked very impressive as he flew through the air, the landing was distinctively less so and he clattered to the ground and off his bike.
And that's why we always tell you not to try this stuff at home… like you have your own motorbike, arena and jumps there anyway.