I WAS BACKING OUT OF THE GARAGE WHEN THE CAR ACCELERATED. I KEPT HITTING THE BRAKE AND IT FINALLY STOPPED. I PUT THE CAR BACK INTO DRIVE AND IT ACCELERATED AGAIN. I TRIED HITTING THE BRAKE AND IT WOULDN'T STOP UNTIL IT HIT THE GARAGE DOOR. I DON'T KNOW HOW FAST IT WAS GOING, BUT IT SEEMED LIKE IT WAS GOING AT AN EXCESSIVE SPEED. *KB