It is illegal to drive with a gorilla in the backseat of your car.

The Law Explained

A bizarre but widely cited law states that transporting a great ape requires them to ride in the passenger seat, not the back. This peculiar rule allegedly stems from an old carnival or circus dispute where an unrestrained primate caused a traffic accident by grabbing the driver from behind. If you are taking a silverback for a spin, he gets shotgun.