THE VEHICLE WAS PARKED FACING UPHILL IN MY DRIVEWAY. I STARTED THE CAR AND SET THE GEAR SHIFT/SELECTOR (AUTOMATIC TRANSMISSION) TO DRIVE POSITION WHILE CHECKING THAT THE BACKUP CAMERA WAS NOT ENGAGED. I RELEASED THE EMERGENCY BREAK WITH MY FOOT ON THE BREAK AND CONFIRMED THAT THE GEAR SHIFT WAS IN DRIVE AND THAT THE BACKUP CAMERA HAD NOT ENGAGED. I RELEASED THE BREAK AND ACCELERATED TO GO UP THE HILL. THE CAR ACCELERATED IN REVERSE. I HIT THE BREAKS AND CONFIRMED AGAIN THAT THE GEAR SHIFT WAS CLEARLY IN DRIVE POSITION EVEN THOUGH I HAD NOW REVERSED AND CRASHED INTO THE GARAGE DOOR THAT HAD BEEN BEHIND ME. I THEN SET THE GEAR SHIFT TO PARK POSITION AND TURNED OFF THE CAR.