The high-flyin', back-flipping world of Freestyle Motocross comes to the L.A. County Fair with the most prestigious event of the year, the ASA World Championships. A dozen of the world's top pro riders, many of who compete in the vaunted X Games, battle it out in a unique head-to-head format for the title of world champion. With big prize money at stake, these free-stylers will be pressing their limits and performing the most insane tricks imaginable.