WAS IN A TIGHT SPOT AT A PARKING LOT, WHEN I WAS BACKING UP I HIT A BARRIER BEHIND ME, AFTER STOPPING AND SHIFTING TO GO FORWARD, THE CAR SPED UP UNCONTROLLABLY UNTIL IT CRASHED INTO A WALL IN FRONT. THE SPACE AND TIME WAS VERY SMALL/SHORT, BUT THE FORCE WAS SO RAPID THAT THE AIRBAGS WERE DEPLOYED.