THE TAILGATE AFTER BEING OPENED BY THE USING THE BUTTON ON THE DASH, THE KEY FOB, OR PUSHING THE BUTTON ON THE TAILGATE ITSELF WILL SUDDENLY SHUT. THE BUTTON WAS NOT PUSHED TWICE. THE CAR WILL GIVE A BEEPING WARNING THAT THE TAILGATE IS SHUTTING. HOWEVER, SINCE THE HUMAN IS NOT EXPECTING THE TAILGATE TO SHUT, HE OR SHE HAS BEEN HIT IN HEAD SEVERAL TIMES. THE CAR IS STATIONARY, IN PARK.