WAS PULLING OUT OF PARKING LOT WHEN VEHICLE SUDDENLY ACCELERATED. HAD FOOT ON BRAKES AT TIME, BUT BRAKES FAILED TO STOP VEHICLE. HIT ANOTHER VEHICLE, AND FINALLY CAME TO A STOP AFTER FUEL CUT OFF SWITCH KICKED IN. HAD VEHICLE TOWED TO DEALER & WAS INFORMED BY MECHANIC WHO ACTIVATED THE VALVE IN TRUNK & WAS ABLE TO RESTART VEHICLE. *AK