I PLACED THE TRUCK IN PARK AND EXITED THE VEHICLE. THE TRUCK THEN BEGAN TO ROLL BACKWARDS IN REVERSE. I WAS KNOCKED DOWN BY THE OPEN DOOR BEFORE I COULD REENTER THE TRUCK AND ROLLED AWAY TO AVOID BEING RUN OVER. THE TRUCK BACKED INTO A FENCE POST DAMAGING THE DRIVERS DOOR AND RIGHT FRONT FENDER. THE FENCE POST WAS ALSO BENT OVER. *NM