4 RIGHT-5 SOUTH, MAN WAS BOLTING ON THE LEFT SIDE OF THE MINER. DRILLED THE BOLT HOLE, INSERTED THE GLUE AND WAS USING BOLTER CHUCK AND MAST TO PUSH ROOF BOLT UP INTO THE HOLE. HE HAD HIS HAND ON THE ROOF BOLT - WHEN PRESSURE WAS APPLIED - BOLT BENT PINCHING THE TIP OF LEFT RING FINGER.