EE INJURED HIS RIGHT LEG WHILE WORKING AT THE R-52 CAR UNLOADING AREA. HE WAES ATTEMPTING TO CLIMB BETWEEN TWO COUPLED RAILCARS TO GET TO A VEHICLE SO HE COULD DRIVE TO A NEARBY RESTROOM FACIL ITY. IN DOING SO, HE STEPPED ON THE COUPLING RELEASE BAR WHICH CAUSED HIM TO LOSE HIS BALANCE AND FALL TO THE GROUND 9ABOUT 3-4 FEET).