What makes you puke?

[The Dong]

Enrique wrote:
> I wouldn't consider ever doing such a thing. Neither I find it funny.
> What I really find astonishing is that the rider can't do much trial & error
> with this kind of thing. How does he reherseal *this*!?

Stunts like this are pre-calculated, for example where to position the 
ramps, at what angle, and the optimum speeds. The rest is just some guy 
driving a bike in a straight line ;)