Continuity mistake: When Eric is battling the wigger kid on the halfpipe, the wigger's skateboard changes. When he's just standing on the top of the ramp, it's a World Industries board, but when he's doing tricks it's an almost all black skateboard.
Continuity mistake: When the four main characters clean out all the debris in the motel's dry pool, the sunlight angle doesn't change at all, even though it had to be several hours' worth of work.
Continuity mistake: When the guy takes a receipt out of the trash, a little kid throws up all over him and the receipt. In the next shot, there is throw up all over the receipt, but both he and the ground are clean.
Continuity mistake: Just before Eric and the Wigger guy have their one on one battle near the end of the movie, just as they start walking up the ramp, neither of them has their helmet on and are loosely carrying them in their hand. The shot cuts, and they both instantly have their helmets strapped on as they reach the top of the ramp.