more like controlled skidding. He is locking up the tire with brakes where drifting is controlling your acceleration input and the loss of traction. Thats being technical but its still pretty cool. You should check out some videos of fixed gear skids. When they are really good, their form is crazy. Look up Skids Gone Wild, it was filmed here in Chicago ans alot of my friends are in it actually. My buddy Simon can skid for about 630 ft.