HEAD REST ON THE DRIVER'S SIDE POPPED OPEN FOR NO REASON. I HAD JUST ENTERED THE CAR, CLOSED THE DOOR, AND THE HEAD REST POPPED OPEN AGAINST MY HEAD. I SEE THAT THIS DEVISE IS PART OF THE ANTI WHIP LASH SYSTEM IN THE EVENT OF A CRASH. BUT THERE WAS NO ACCIDENT AND THE CAR WAS STATIONARY IN A PARKING LOT OF A STORE. *TR