The skiff was still shaking with the destruction the other shark was doing to the fish and the old man let go the sheet so that the skiff would swing broadside and bring the shark out from under. When he saw the shark he leaned over the side and punched at him. He hit only meat and the hide was set hard and he barely got the knife in. The blow hurt not only his hands but his shoulder too. But the shark came up fast with his head out and the old man hit him squarely in the center of his flat-topped head as his nose came out of water and lay against the fish.