AS I WAS BACKING-UP IN PARKING LOT, THE CAR SUDDENLY ACCELERATED. AFTER TRAVELING ~ 20' AT AN ACCELERATED PACE, THE REAR OF THE CAR HIT A CONCRETE BALLARD. UPON IMPACT THE CAR JUMPED INTO A FORWARD GEAR, ACCELERATED FORWARD AND HIT A PARKED CAR. IF NOT FOR THE PARKED CAR, OUR ACURA MDX WOULD HAVE PLOWED INTO A STORE FRONT. *JB