1. Car was parked at a rest stop, on a hot day, and idling in "PARK" with air conditioner on. One passenger was in the car in the front passenger seat. No one was in the drivers seat. The driver of the car was about 20 feet away and making a phone call to make hotel reservations. After about 10 minutes, the car suddenly started moving in reverse, while the passenger was sitting in the passenger seat. The passenger was alarmed by this movement and tried to get out of the car on the passenger side and opened the car door. The passenger then fell to the ground and avoided the door opening, but the front wheel of the car ran over her lower right arm , breaking the large bone in the arm and causing multiple lacerations. The car proceeded in reverse, finally coming to a stop against a small hill about 100 feet away. The passenger was rushed to a hospital and received emergency care.