I PULLED INTO MY LONG NARROW DRIVEWAY (ABOUT 100 FEET) SLOWLY AT ABOUT 3 MPH. I LET THE CAR GO BY ITS MOMENTUM AND LIGHTLY PRESSED ON THE BRAKE SO IT COULD COME TO A COMPLETE STOP. WHEN THE CAR APPROXIMATELY ABOUT 7 FEET FROM THE FRONT OF THE GARAGE, IT ACCELERATED SUDDENLY AND SMASHED THROUGH THE FRONT DOOR AND PART OF THE GARAGE. I PUT MORE PRESSURE ON THE BRAKE, BUT IT KEPT GOING AND HIT THE BACK WALL BEFORE THE ENGINE SHUT OFF. THE AIRBAGS DID NOT GO OFF. I REPORTED THE INCIDENT TO THE POLICE AND MY INSURANCE, AND THE INSURANCE DECLARED THE CAR WAS TOTAL LOSS AND THEY TOWED IT AWAY.