THE EMPLOYEE WAS INSTALLING A 42"" RESIN BOLT AND PLATE IN THE DRILLED HOLE. HE PUT 1/2 OF THE BOLT IN THE ROOF THEN STRAIGHTENED IT BY HAND, PUT THE HEAD OF THE BOLT IN THE CHUCK, STARTED TO P USH IT IN THE ROOF AND SPIN IT TO MIX THE RESIN.HIS CUFF ON HIS GLOVE CAUGHT THE PLATE AND TWISTED HIS HAND AROUND THE BOLT.