I had a knock at the door one evening five years ago, it was my neighbour from upstairs. He held a wallet out in front of me with a photo in it and asked if I knew who it was. I asked if it was him, no he said, and asked did I recognise the name, of course I recognised it as it was someone I knew from the pub I frequented.
I told him to come in, and asked where he found it, he had been out and found it about a mile away, he tried to hand it in to the police but the station was closed.
When he got home he typed the name of the owner into Facebook and on his page was a message I had left earlier that evening. He recognised my name and put two together, what were the chances of that happening?