As he slipped beneath the surface, I took one of the rocks lying by the footpath and held it above me. And the moment his head emerged from the water gasping for air, I brought it down upon him with all my might. I can still recall the crunch it made as it collided with his skull and how he disappeared again into the water. It was a good twenty minutes before he surfaced again, face down and motionless. It was too dark to see his blood in the water so I had to use my imagination instead.
