Continuity mistake: During the vault chase scene, the vault spins on two separate occasions, tangling the lines in the process. The first time, it is being dragged out of the police station and the second when it destroys half a bank. The lines could not have been untangled, because both times they guys were turning to the right and the vault spins in the same direction.
Continuity mistake: When O'Connor blocks the bus on the two-lane highway with his vehicle, the bus swerves around his car towards the shoulder, clips the right rear of the car, and breaks the vehicle's rear window. In the next shot, the bus reverses angles, flips over the left rear of O'Connor's car nearest the center line, becomes airborne, and then rolls over and over down the center of the highway. If it had continued on its initial trajectory, it would have crushed his vehicle and continued onto the shoulder.
Other mistake: In the scene where Toretto and Hobbs are fighting, the fight is so violent that Toretto's eyes are run through glass, faces are smashed into concrete and beat endlessly. Yet when the fight is over, the next scene shows both with not so much as a mark on their faces.