Quinn scrambled back as the shark landed on the floor with a wet splat. Its tail spasmed and jam opened in silence. It could not get to him. It could not even get back outside. It was as vulnerable out of the water as he had been in it. Its eyes rolled and it began to suffocate. Quinn waited for the hammerhead shark to stop thrashing about. Eventually it lay still He approached it cautiously. Then he put the sole of his foot against its flank and rolled it back into the sea.