I was reminded this morning of a holiday around 4 years ago, in the US. We were staying in San Francisco and went on an arranged day trip/tour one day. Got talking to another Brit on the coach. We were discussing where we lived, and when I told her where I lived, she said that her DD had just bought a house in the same town. I asked her whereabouts her daughter lived - after some to and fro questions, turns out her daughter was the lady who had just bought the house next door to us a few weeks prior.
Really bizarre.
Any other weird ones?