Watch

My wife and I were on a cruise. She was talking to one of her friends. "Honey, this watch I bought the best in the business, "my wife said, turning her wrist to show it off. "It's an incredibly lightweight design and it goes 650 metres underwater!" "Can it really?" I asked. She said, "Yeah." I took it off her wrist and chucked it into the ocean. Her friend gasped. "Nonsense," I replied, pointing, "you can see it's still floating."