WHILE REVERSE PARKING AT APPROXIMATELY 10 MPH; THE ACCELERATOR STUCK TO BOTTOM OF VEHICLE FLOOR (SENDING VEHICLE TO SPEED EXCEEDING 70 MPH) AND IT ACCELERATED OUT OF CONTROL. IN AN ATTEMPT TO STOP AND AVOID HITTING PEDESTRIANS AND BUILDING BEHIND ME; I HIT THE BRAKES, BUT THE BRAKES WOULD NOT STOP THE VEHICLE. I WAS FORCED TO PLACE THE VEHICLE IN PARK SHIFT POSITION WHILE HITTING BRAKE, IN ORDER TO STOP VEHICLE. AT FIRST THE SHIFT CONTROL STOPPED IN 'D' AND THE VEHICLE SHOT FORWARD, BUT I KEPT HITTING THE BRAKES. AND EVENTUALLY; I MANAGED TO GET IT IN THE PARK POSITION AND IT STOPPED THE VEHICLE. *TR