TRUNK DOOR AUTOMATICALLY CLOSED AFTER BEING OPENED TO PLACE ITEM IN TRUNK AND FAILED TO REVERSE ITSELF AFTER CLOSING ON WIFE'S HEAD. CAUSED LACERATION TO FOREHEAD AFTER TRUNK DOOR HIT HER HEAD AND CONTINUED TO CRUSH INTO HER. HAD TO RUSH TO EMERGENCY ROOM DUE TO SIZE OF CUT AND BLEEDING. THE VEHICLE WAS PARKED DURING THE INCIDENT.