Here's a good one.

[Nitrohaulic]

http://www.youtube.com/watch?v=21dTTe76UJA&search=humorous crashes

Never quit?

http://www.youtube.com/watch?v=V4CcRbw7arM&search=humorous crashes

 

[ReactionTimes]

You could just see it coming in the first one...LOL!

I wonder if he ever got it completely right in the second one? You can see at the end he eventually falls off.