EE WAS CLEANING AND INSPECTING THE SHOP GREASE PUMP WHICH HAD BEEN LEAKING GREASE AROUND THE PISTON. HE TOOK THE GUARDS OFF TO FIND THE LEAK, WHEN THE PISTON GRABBED THE RAG IN HIS HAND. WHEN ATTEMPTING TO FREE THE RAG THE PISTON CAUGHT HIS FINGER, LACERATING A 2"" LONG PIECE OF SKIN.