EE WAS AT THE LUBE AREA WITH HIS END DUMP TURNED OFF AND WHEELS CHOCKED. HE WAS INSPECTING THE UNDER CARRIAGE AND UPON COMPLETION HE WAS BACKING OUT BENT OVER. HE THOUGHT HE WAS CLEAR OF THE M ACHINE AND RAISED UP, HITTING THE AIR TANK DRAIN SPIGOT WITH THE CENTER OF HIS BACK.