WHILE VEHICLE WAS IDLING IN PARK IT STARTED ROLLING BACKWARDS IN REVERSE, AND ACCELERATED WHEN IT CAME TO A SLOPE. VEHICLE CONTINUED MOVING FOR APPROXIMATELY 75 YARDS UNTIL IT CRASHED INTO ANOTHER PARKED VEHICLE. NO INJURIES TO REPORT WITH THIS INCIDENT. BODY DAMAGE HAS BEEN REPAIRED BY A PRIVATE SHOP, BUT IT HAS NOT BEEN EXAMINED TO DETERMINE IF THERE WAS A REASON FOR THIS PROBLEM TO HAVE OCCURRED. PLEASE PROVIDE ANY ADDITIONAL INFORMATION / ATTACHMENTS. *AK