EE FELL OFF LADDER & CAME TO REST OVER DOOR OF BOTTOM DUMP RAIL CAR. EE WAS INSIDE CAR AT TIME OF INCIDENT, INSPECTING SAME. WHILE IN THIS POSITION, HIS FOOT WAS IN THE AREA OF THE DOOR, WHICH WAS CONCURRENTLY BEING CLOSED FROM OUTSIDE OF COMPARTMENT. UPON BEING ALERTED, OTHER EMPLOYEES OPENED DOOR & HE EXITED RAIL CAR.