THE EE WAS ROOF BOLTING ON ENTRY THAT WAS CUT HIGH FOR A BOLT HEAD. THE EE WAS ERILLING A HOLE TO INSTALL A ROOF BOLT AND THE CONNECTOR THAT HOLDS THE DRILL STEELS TOGETHER BROKE. THE TOP SECI TON OF THE DRILL STEELS FELL AND STRUCK THE EE ON HIS RIGHT ARM. SIX STITCHES NEEDED.