Champ, thanks for starting this thread!
And from the looks of these things, yeah, they really book it.
I now see why you guys wear helmets and all, I found this vid of this guy being thrown off his cart
http://www.youtube.com/watch?v=AMc2C...eature=related
This shows that you guys really are going high speed for such small vehicles and that the rigs you sit on have some serious power to them. I'm definitely impressed.