I've really been digging Ninja Warrior since bartley mentioned that it started airing on G4 recently. (It's much better than that MXC shit. In fact, there's really no comparison.) The guy in the above video was, I believe, one of the first people to actually complete the entire course. If you have 9 minutes, you should watch the whole thing. It will blow your fucking mind.
Also, this gives me just cause to link to a good ol' fashioned wtf japanese video. That's Nakayama Kinnikun, a supposedly famous TV comic. He's also pretty good at finishing stage 1 of Ninja Warrior, but nothing after that.