TWO MECHANICS WERE STRAIGHTING THE GLANGE ON A COOLER TUBE ELBOW. OUR MECHANIC WAS USING A ROSEDUB TO HEAT THE FLONGE AND THE OTHER MECHANIC WAS STRIKING IT WITH A SLEDGEHAMMER. WHEN STRIKING THE GLANGE THE HAMMER HAD DID NOT CATCH THE FLANGE FULLY AND CONTINUED THE SWING AROUND AND STRUCK THE OTHER MECHNAIC WHO WAS STANDING TOO CLOSE IN THE FOREHEAD. HE RECEIVED A LACERATION CONTU