A friend of mine was in the queue for a flight a few years back. Both going to Valencia on the same day, on the same flight, by coincidence.
I was sitting on the balcony of an apartment in the old town of Valencia on that same trip when I heard someone calling my name. A mate of mine who lives 50 or so miles from me was walking down the road.
This sort of thing seems to happen to me frequently.
In New York I walked out of my friend’s apartment on W24th Street just as a friend of mine from Fulham was walking past. The same friend happened to be in a bar that I went into in Silverlake, Los Angeles a year later.
I have at least half a dozen other examples of how small the world is too.