Continuity mistake: There is a scene where the female trucker is driving her truck and she intentionally hits a brown car. The problem is that she had already passed by this brown car a few seconds ago when David was getting into her truck through the window.
Continuity mistake: When David is in the telephone booth trying to call the police he mentions that he can only read the first few digits of the phone number. Then there is a shot of the center of the dial which is almost all black and we cannot read any digit. A few seconds later another shot shows the center of the dial which is now white and we are able to read the first few digits.