VEHICLE WAS IDLING IN DRIVEWAY WITH THE DRIVERS DOOR OPEN. TRANSMISSION WAS IN PARK. TRANSMISSION DROPPED INTO REVERSE, ROLLED BACKWARDS IN DRIVEWAY, CRASHING THROUGH TWO CHAINLINK GATES, THE DOOR WAS TORN BACK AGAINST THE FENDER, I TRIED TO REACH INTO THE TRUCK TO TURN IT OFF, AND WAS PINNED BETWEEN THE TRUCK, AND THE CHAIN LINK FENCE. EXPLORER CURRENTLY IN THE COLLISION SHOP, AND TRANSMISSION WILL BE REPAIRED WHEN THE BODYWORK IS DONE. *TR