Continuity mistake: When Mr. Clark drives his car to the inner city school, he asks a punk where the faculty parking is. The punk points to the parking lot and as John drives away all of his tires are blown out by road spikes (he goes through a wrong way road). When he gets out of the car, notice that some of his tires have mysteriously reinflated themselves.
Continuity mistake: When Clark parks his car outside the school he places a steering wheel lock inside the car. When it cuts, from outside the car the lock is gone. (00:05:15)
Continuity mistake: When Clark walks up to the speakers table, the milk box that Doyle left there is visible. When it cuts from behind Clark the milk box is gone. (00:15:50)
Continuity mistake: After Victoria has been assaulted, she is holding an ice bag to her head. When Clark says he is touching himself she removes the bag from her head. When it cuts she is still holding the bag to her head. (00:39:10)
Continuity mistake: When Clark and Victoria first meet with DeMarco's henchman, the henchman's ponytail changes position between the shots. (01:03:25)
Continuity mistake: When Clark is being told he has been promoted he blows all the ash out of the pipe, all over the cake. In the following shots the ash on the cake is gone. (00:02:10)
Continuity mistake: When Clark first meets principal Doyle he says "I don't think there is such thing as bad kids", while Victoria is hanging up a poster in the background. When it cuts to a close-up of Victoria she is looking in Clark's direction and the poster is up. It cuts again and Victoria is still hanging up the poster. (00:10:05)
Continuity mistake: When Clark's father puts a pipe in his mouth his hands aren't touching it once it's in place. When it cuts he is suddenly holding his hand on the pipe. (00:01:50)
Continuity mistake: When Clark writes "Yo, you wack punk" on the chalk board, the writing differs between the shots. (00:46:40)
Continuity mistake: When Clark is hanging up his diploma in the classroom he hits a hole in the wall, and a big plank can clearly be seen inside the wall. When it cuts the plank is gone. (00:11:20)
Continuity mistake: When Griff puts down the gun and Paco asks what he is doing, the gun changes angle between the shots. (01:00:35)