THE EE WAS HOLDING UP A BUSHING WITH A TIRE SPOON AT THE REAR OF THE MECHANICAL SCALER BOOM WHILE ANOTHER EE WAS INSTALLING A PIN FROM THE OPPOSITE SIDE OF THE SCALER. THE OTHER EE DROVE IN TH E PIN, WHICH HIT THE TIRE SPOON, WHICH HIT THE EE'S CHIN. THE EE NEEDED 9 STITCHES TO TIE UP THE LACERATION TO THE CHIN.