Message in a bottle.
Stranded on a desert island, I scribble a note saying, "Help I'm lost" and chuck it into the sea." 6 months later the same bottle came back and had a new message that said, "I'm lost as well, but lets pass the time away. I spy with my little eye, something beginning with S". So I wrote "sausages" and threw it back in! This bottle was on the beach in Dubai with waves crashing over it.