How Not to Land a Bike [Video]
Mid-air bike balance is the key element keeping things together. Lose this balance and you're in for a hard landing and a crash. And the rider in the video has just learned this lesson. Lucky for him, despite the fact that he crashed rather hard, both him and the bike made it without harm.
Not sure if he kept on jumping that day, though. Most likely he went home and watched the video again and again, to figure out why landing on a flat surface front wheel first is bad. And maybe he remembers to wear a helmet next time.