REAR LIFTGATE ON 2004 TOYOTA SIENNA FAILED. IT WAS IN UP POSITION AND SUDDENLY CAME DOWN AND I WAS UNABLE TO GET IT UP WHILE I WAS UNDER IT LOADING GROCERIES. THE WEIGHT OF THE DOOR HIT MY SHOULDER FIRST AND KNOCKED ME INTO THE BACK OF THE VAN. I WAS THEN ABLE TO PUSH IT BACK UP AFTER I DROPPED THE GROCERY BAGS. THE DOOR CAME DOWN VERY FAST AND FORCEFUL,LY. I WAS SORE BUT VERY THANKFUL THAT MY 4 YEAR OLD WASN'T UNDER THE LIFT GATE WITH ME.*AK