A biker's attempt at drifting goes bad.
Check out this pro mountain biker.
This dude gets hit from behind and has his bike totaled but at least he landed on his feet.
Two dirt bikers come around a corner and smash right into each other.
Helmets are good for other things too.
3...2...1...Blast Off! I think he took the corner a little too fast.
This is nuts. And you thought Lance Armstrong was good!
A car gets revenge on some aggressive bikers.
A biker shows off in this video clip.