Revealing mistake: Right after Sage plays chicken with the cops, the cop car is shown peeling out in reverse to follow her down the alley. The dust from the burnout is ejected towards the back of the car. Being a Crown Vic, the car has rear wheel drive but the dust should be moving opposite the car's direction. What this shows is that the car was actually being pulled backwards as it attempted to accelerate forwards. What's more is that even the sound is of a car spinning its tires opposite to being dragged. (00:12:50)
Continuity mistake: When Marcus is being chastised for the clothing he is wearing in the dance room, you can see a reflected shot of him looking down toward his feet. In the next shot, he looks down again.
Continuity mistake: When Sue is talking to Mr. K, the phone rings four times before Mr. K answers it. But when Sue watches this scene on the cinema screen later, Mr. K answers the call after two rings.