Chance Encounter with My Uncle's Long-Lost Flatmate

I talk about a strange encounter I had at a bar in a big European city. A man sitting next to me reminded me of my uncle, who had been living in the U.S. for 25 years. When I mentioned this to the man, he revealed that he had been my uncle's flatmate 30 years ago for about half a year. It was a very unexpected and weird coincidence.