Other mistake: There is a scene where Danny Glover is driving a car with Martin Short in the passenger side seat. At several points, Glover turns the wheel to the right and left, yet the car remains in a straight course.
Other mistake: When Eugene, Raymond, and Frank Grimes get back into the car, Raymond and Frank get in the back seat, with Eugene in the driver's seat. During the conversation before taking off, Eugene keeps looking up and to the right to look at Raymond and Frank in the rearview mirror. However, there is no rearview mirror.
