INCIDENT HAPPENED IN MALL PARKING LOT. TRIED TO PUT JEEP IN REVERSE AND VEHICLE DID NOT GO INTO GEAR. PUT VEHICLE IN PARK, CHECKED TO MAKE CERTAIN EMERGENCY BRAKE WAS NOT ON THEN PUT IN REVERSE AGAIN. THIS TIME IT ACCELERATED EXTREMELY FAST AND BACKED INTO A PARKED CAR BEHIND ME WHICH SLID INTO CAR NEXT TO IT, WHICH SLID INTO THE CAR NEXT TO IT. IT HAPPENED IN ABOUT 1/4 SECOND AND DAMAGED 4 CARS, COUNTING THE JEEP. *TR