Watch on 123Movies. GCN's James Lowsley-Williams and GMBN's Blake Samson are trading in their usual bikes for ones with much smaller wheels, as they try their hand at two variations of the incredibly varied sport of bicycle motocross. We'll explore the history of BMX to learn about the rise, fall and rebirth of one of cycling's most explosive forms. From racing on the track to landing tricks in skate bowls, what does it take to make it to the top level of BMX?