VEHICLE WAS PARKED AND NOT RUNNING. THEN, TRANSMISSION JUMPED OUT OF GEAR AND ACCELERATED BACKWARD. THE PASSENGER DOOR UNEXPECTEDLY OPENED, AND PASSENGER WAS DRAGGED DOWN THE HILL AND HIT A PARKED CAR. THE PASSENGER SUSTAINED INJURIES, AND WAS TRANSPORTED TO THE HOSPITAL. VEHICLE WAS TOWED TO THE DEALER FOR INSPECTION.*AK