WHILE PLACING A PIN IN A BUCKET CYLINDER, HE GOT HIS HANDS COVERED WITH GREASE. HE THEN PICKED UP 18 LB SLEDGE HAMMER. WHILE USING HTE SLEDGE TO HAMMER IN THE PIN, THE SLEDGE SLID DOWN THRU HI S HAND AND STRUCK HIS INDEX FINGER. THIS RESULTED IN THE NEED TO STITCH UP A CUT ON THIS FINGER.