In the early scene where Johnny T blows up the BMW, the fire trail never ignites on the side of the car which means the car never should have blown up. Also, the gas cap door is goes from being open to closed after the car is burning.
When the cars are leaving the parking garage the second car crashes through the right hand security gate despite the fact that the first car had already broke it off when it left.
At around 1:16:47 camera tracks are clearly visible in a shot of the border point.