Try Not to Laugh at these epic fails! Physics were not on their side today! These are the funniest instant karma, courtesy of gravity fails. Watch this funny fails compilation ...

Add Yahoo as a preferred source to see more of our stories on Google. From epic wipeouts to "what were they thinking?!" moments, this ultimate compilation of extreme fails will have you laughing, ...

A 10-second dare challenge puts flexibility, speed, and creativity to the test. I compete against Zack in a series of fan-submitted challenges where every task must be completed before time runs out.

From a fearless young rider chasing X Games energy to skydivers, climbers and zipline riders learning tough lessons mid-stunt, this extreme sports edition packs bold moves, funny crashes and plenty of ...