You may have seen people do it on a bike or a skakeboard, but you've never seen a person do it with their legs alone. Recently, a stuntman named Damien Walters found a way to become the first person in the world to run a complete 360-degree loop-the-loop!

Walters worked with scientists from the Department of Mechanical Engineering at MIT in Boston for four months to complete the stunt. They built a 10-foot-high Llop-the-loop and calculated that it should be possible to complete the stunt if he ran at a constant velocity of 8.65 mph around the 360-degree track.

Want to see him do it?