I STARTED MY CAR AND PUT IT IN REVERSE IN A PARKING GARAGE AS I WAS ATTEMPTING TO EXIT THE GARAGE. THE CAR ACCELERATED WHILE I WAS IN REVERSE, SLAMMING INTO TWO PARKED VEHICLES. THE CAR THEN ACCELERATED FORWARD, SLAMMING INTO A CONCRETE COLUMN AND COMING TO A REST. I ATTEMPTED TO SLAM ON MY BRAKES BUT THE CAR WOULD NOT STOP. IT FELT LIKE MY ACCELERATOR WAS STUCK RATHER THAN A PROBLEM WITH THE BRAKES.