Revealing mistake: When Kirsty breaks them out of the police jail with the van she stole, you can see the fake wall created, as it built out of line with the real wall.
Revealing mistake: In the scene where Kirsty is in the Porsche at the beginning of the film, the car flips whilst on the gravel car park. You can see the device (log or metal rod) that helps flip the car. As the car rolls you can also see the hole in the bottom of the car where the flipping device had come from. (00:05:00)