EE WAS HELPING CHANGE WEAR PLATES & TEETH ON THE LOADER BUCKET. AN IMPACT WRENCH WAS BEING USED TO LOOSEN THE NUTS. ONE BOLT WAS LOOSE & DROPPED DOWN. WITH HIS GLOVES ON HE PUSHED THE BOLT BAC K INTO ITS CRADLE TO CONTINUE TO LOOSEN. AS THE WRENCH WAS APPLIED THE BOLT DROPPED DOWN & THE HEAD SPUN AROUND LACERATING THE FINGERS ON HIS RIGHT HAND.