Differently people behave in extreme situations. I'd like to think that this case - a rare exception. It is clear that the shock and all that, but there is the same person. Flew very well. Your fault. And do not come and at least ask how to help - this is something beyond good and evil. Thank God, the biker was still alive after such a flight. Double fracture of the tibia, but in general, we can say - with a minimum of damage in this case. Well, those who helped, just like human beings thanks. Road - hard place. And no one is safe from such cases.