Continuity mistake: In the scene where Jonathan finds Cooper in the bathroom possessed, Cooper attacks John with a knife in his left hand. As Cooper lunges at him, John slams the door, but Cooper's left hand crashes through with little problem. But, there's no knife. The knife is now in Cooper's right hand. (01:05:42)
Continuity mistake: In the scene where Rhino pulls Johnathan from the blue police car, he completely smashes the back window to get him out. When John's father/Pinker backs the car out to chase Johnathan, the window is intact.