EE WAS OPERATING A BEAVER DRILL DRILLING A HOLE IN THE ROOF TO INSTALL A BOLT FOR A MONORAIL HANGER. THE DRILL STEEL CAUGHT AN EXISTING BOLT WHICH CAUSED THE BEAVER DRILLSTEEL TO STOP ROTATING , TWISTING EE RIGHT ARM. THIS RESULTED INTO A STRAIN TO HIS RIGHT ELBOW FOR WHICH HE IS NOW RECEIVING THERAPHY TREATMENTS.