EE USING 6' LONG BAR TO UNLOCK AND OPEN RAILROAD CARS AGGREGATE MATERIAL. EE PLACED STEEL BAR IN DOORS LOCK TO OPEN DOOR. EE DID NOT IMMEDIATELY OPEN DOOR, BUT INSTEAD WALKED BACKWARDS WITH THE BACKING TRAIN. EE HAD HIS RIGHT HAND POSITIONED OVER THE FLAT END OF THE BAR. THE EE'S RIGHT HAND BECAME WEDGED BETWEEN THE STEEL BARS AND AN ADJACENT STEEL COLUMN.