Biker Boyz (2003)

Revealing mistake: In the scene where Jalil and Smokey are talking on the race track, after Jalil wipes out in his race: if you look behind Jalil when Smokey leaves, you can see that the man sweeping the floor in the stands isn't actually sweeping at all - his broom is inches above the ground and he is simply sweeping air.

Smoke: Damn, Kid, why can't we just talk? You know like.
Kid: Like what? Father and son?
Smoke: Naw, like friends.
Kid: We aint friends.
Smoke: Alright, father and son then.
Kid: We aint that either.
Smoke: Jaleel, I'm your father.
Kid: Fuck you Smoke.