ARRIVED AT A WAREHOUSE TO UNLOAD BOXES FROM THE TRUNK OF CAR. HAD 2 PASSENGERS IN VEHICLE. BACKED INTO UNLOADING ZONE AND PARKED CLOSE TO THE DOOR. OPENED THE DRIVER'S DOOR LEAVING IT OPEN. PASSENGERS GOT OUT OF THE VEHICLE LEAVING THE PASSENGERS DOOR OPEN. AFTER SPEAKING WITH THE WAREHOUSE MANAGER, DRIVER AND PASSENGER STARTED TO UNLOAD THE VEHICLE FROM THE TRUNK. ALL PASSENGERS WERE OUT OF THE VEHICLE FOR SEVERAL MINUTES. THE CAR STARTED ROLLING BACKWARDS WHEN DRIVER WAS BEHIND UNLOADING BOXES. DRIVER GOT PINNED BY THE CAR AGAINST THE GARAGE WALL AND WAS PINNED BY THE LEFT BUMPER AND TAILLIGHT. . HEAD CRUSHING INJURY, BROKEN SHOULDER. BROKEN WRIST. ONE OF THE OTHER PEOPLE WERE ABLE TO STOP THE CAR AND PULL FORWARD. DRIVER SURVIVED BUT SUSTAINED SIGNIFICANT INJURIES. 10 PIECES OF GLASS IN SIDE OF FACE AND SKULL WHICH WERE REMOVED FROM HOSPITAL.