(at around 24 mins) When Rockford is driving to evade the car with Beth's pursuers, the shot from the car's left front fender shows only Rockford and the car in pursuit. The camera has Rockford a bit too close to the center of the shot, making enough of the front passenger seat visible enough to reveal that seat to be empty; Beth has disappeared for that entire shot.
A car chase takes place entirely on dirt, yet their tires squeal all the time as if they are on asphalt.