Description:22 33 50 00 Sport. California. Annual competition of motorcycle cross on hill, series of motorcyclists try to climb a hill with their motorcycles. Assembly better moments. Close-up motorcyclist who dash fall, skid go up the hill, then and falls. Motorcyclist turns around, makes a gliding flight. A motorcyclist manages to climb the hill. A motorcycle falls again quite below, impressing, impression that it behaves alone.