When Jeannie is escaping from the warehouse in her red mini, the front number plate reads 754 PLP or 754 FLP, but when the shot goes to the rear of her car, the number plate reads BAP 245B.
When Sam looks in his rear view mirror and notices Jeff tailing him, you can clearly see that the image of Jeff's car/number plate are not in reverse like they should be.
Obvious doubles used for Jeff and Sam during their fight in the office.