Mono Skier X was already completely insane. Strapping a single ski to one's backside and rocketing down a mountain takes a bit of crazy, especially when it's done in a race format with three other competitors. Add in huge jumps and, well, we'll go ahead and pass on trying this ourselves.
You just knew the wipeouts were going to come fast and furious. And at the conclusion of the finally heat of Mono Skier X at the 2012 X Games, everybody hit the deck.*
*Note: Not everybody, but bodies and skis were flying everywhere.
Yard sales all over the place. This is the best (they were fine, I think).