Hey that's odd, what I've found happens on pavement is, as it goes from one side to the other the front end has to go up & down, and at a certain point it goes too fast and the wheel gets off the ground after crossing the middle point, so then front end smacks the ground. But that bike crashed like it was riding on snow, the front end washed out without coming close to jumping off the ground, it just ran out of traction. Weird.
