EMPLOYEE WAS HELPING TO DISLODGE A PIECE OF STEEL HUNG IN JAW CRUSHER. THEY WAS USING A DRIFT PIN AND A SLEDGE HAMMER. INJURY EMPLOYEE WAS WATCHING ANOTHER EMPLOYEE HIT THE DRIFT PIN WITH HAMM ER WHEN A PIECE BROKE OFF & FLEW INTO CORNER OF LEFT EYE. THE PIECE WAS HOT & BURN EYE.