MOVING HOLE OPENER FROM BACK OF PLATFORM TO THE FRONT OF PLATFORM WITH HOIST LINE, ONE MAN WAS HOLDING IT AT THE BOTTOM TO MOVE IT FORWARD AS IT WAS RAISED, THE INJURED MAN GRABBED IT AT THE T OP AS THIS MOTION STARTED AND SMASHED THE END OF HIS RING FINGER ON HIS LEFT HAND BETWEEN THE HOLE OPENER AND DRILL PIPE.