[youtube]http://www.youtube.com/watch?v=q4BuDVkUKY4[/youtube]

Remember the video of the guy who smacked his nuts trying to pull a parkour maneuver, and subsequently pooped his pants? Well, he’s in here, among friends, all who have one thing in common: they’re complete parkour failures. Check out the best head-banging, nut-crunching, window-shattering parkour fails so far this year.