This looks like a very fun way to die!

Rock climbers are, I believe, lacking that one part of their brain that tells them whether something can kill them. As a result, they do incredibly stupid things like 1) climb mountains, and 2) stunts like these, where one of them hangs off the rock face and goes for a swing.

This dude tried the latter and, while things went okay, the whole thing looked absolutely insane. Thankfully he meant to do this. Otherwise, I think he would have reacted pretty differently.