Continuity mistake: After Mick and JC finish having sex, in the shots of both of them together talking, she's leaning on her nightstand. When the camera is just on her, she's leaning up with her arms around her knees. (00:12:40 - 00:13:40)
Revealing mistake: Obvious dummy when Mick slams into Paco's little brother. (00:21:05)
Continuity mistake: Mick buys 3 cans of cola from the machine. But when he's in his room and empties his pockets, there are 4 cans. (00:48:20 - 00:49:15)
Visible crew/equipment: About one hour and fifty minutes in, the two stars get into a fight and are rolling around the floor. In at least one scene, a cameraman, with a handheld Panavision camera, is quite visible in the middle of the shot.
Continuity mistake: Horowitz applies the corrosive chemical to one fence, but when he and Mick escape the next day, they break through two fences.
Other mistake: During the police chase, Mick hits Paco's little brother and then slams into the white van, and it instantly bursts into flames creating an inferno. Which would not occur under normal circumstances. But merely dramatized for movie effect.
Audio problem: When Horowitz is being taken to Solitary, his lips do not match what he's yelling.
Continuity mistake: Just one second before Mick stabs the floor instead off Paco, Paco has no blood around his mouth and nose.
Factual error: I don't know of any court system in the U.S. that will allow a person, teenager or not, to get into shootouts, steal a car, and maliciously run over/kill someone while fleeing a crime, and all they get is time in a juvenile detention center because they're underage. Whether you're a teen or not, if you commit crimes like that, you get tried as an adult, no exceptions, which means prison.
Revealing mistake: When Paco and his accomplice attack JC in the alley, they tackle her to the ground and he starts punching her in the face to render her helpless. However, the action and the audio are not in sync, and its obvious his fists are not really hitting her at first.
Revealing mistake: After Mick and Paco fight near the end, there is no blood on either dude just before Mick pins him. And then suddenly both their faces are covered in blood just before Mick stabs him with the knife.
Continuity mistake: Before Tweedy rapes the black kid, Horowitz was playing soccer with Mick but suddenly he is drinking water below Tweedy and Viking.
Suggested correction: This is not Horowitz! Watch carefully. Horowitz doesn't have a beard.
Continuity mistake: At the beginning at the school when Paco says " hey J.C." his body and his left arm against the locker move between shots.
Continuity mistake: The large scar on Mick's face increases size between when he is with the judge and when he gets to the jail.