I SLOWED TO PULL INTO A PARKING SPACE ON THE ROOF OF PARKING GARAGE. I TAPPED MY BRAKE AND FELT A SUDDEN SURGE OF POWER. (NOISY POWER SOUND) I FORCEFULLY PUSHED DOWN ON THE BRAKES AND BURNED RUBBER MAKING VISIBLE SKID MARKS. THE CAR WENT OVER BOTH THE CEMENT BUMPER IN FRONT OF MY CAR AND THE CEMENT BUMPER OF THE FACING CAR AND CAME TO A STOP WHEN IT HIT HIS CAR. BOTH CARS SUSTAINED MAJOR DAMAGE TO THE FRONT. I WAS NOT INJURED AND NO ONE WAS IN THE CAR I HIT. IT IS FORTUNATE THAT THIS DID NOT OCCUR AT A STOP WITH PEDESTRIANS. *TR