Revealing mistake: Watch carefully after Angela is thrown through the windshield of the bus. There is a shot of diamonds and blood-stained glass scattering on the floor. But in reality, there is a shot of plain diamonds falling and the bloody glass is faded in during the middle of the shot. Most visible on the edges of the screen, where the pieces emerge from nowhere.
Revealing mistake: Although the police Camaro has ABS (for Anti-lock Braking System) moulded into the brake pedal rubber, they must have disconnected this system for dramatic effect, so that John could lock the wheels and smoke the tyres under heavy braking.