One night when returning from a party at work, I've decided to stay a while longer in the tram to escort my co-workers to the tram central hub (which was like half an hour of tram ride), instead of getting out at my home, which was only 5 minutes from our workplace.
When I got into the tram back home, there was an older guy with a carboard robot costume, who was talking to someone about his work in the theater. Because I find people like that interesting, I decided to move closer and sit next to them, so I can listen to their pretty interesting conversation. I've tripped and basically literally fell into their conversation, and the other guy left, so we started talking. It turned out he does a prop-guy on movies and for theater, and we hit it off pretty well. He also lived literally 3 minutes from my place, and we have decided to go have a few more beers at his home, which was basically a storage lot full of random stuff without much furniture - just random props, one bed, and a lot of beer.
I've messaged my GF that I'll be late, since I'm drinking with this pretty cool old guy, and send her a picture of the place. Her reponse was "Wait, isn't that ?". Turns out, he was a prop guy on a movie they were filming a lot of years ago at their old family house when she was young, and not only he was the most fun guy to be around there, always sneaking out to drink with them, but also briefly dated her (late) mother, so he's basically her step-dad. Since he's pretty old-school, no social networks, internet and barely a phone, we did exchange contacts and since then have seen him a few times, and it was always a treat, like getting us to the backstage of theater production. But the way we have met is so, so random and the odds of something like that happening are mind blowing. I usually don't follow random people home, but here we have hit it off so well that we wanted to keep talking and it didn't even felt weird.