CAR WAS STOPPED IN DRIVEWAY WHILE EXITING TO OPEN GARAGE DOOR USING BUTTON IN GARAGE. GOT BACK INTO CAR AND PUT CAR IN DRIVE TO PULL INTO GARAGE. CAR TOOK OFF OUT OF CONTROL. BRAKES DID NOT SLOW VEHICLE. IT KEPT ACCELERATING WITHOUT PRESSING GAS PEDAL. BRAKES DID ABSOLUTELY NOTHING TO STOP VEHICLE. VEHICLE STOPPED ONLY AFTER BUSTING THROUGH A BRICK WALL IN REAR OF GARAGE.