This refers to when two or more people encounter each other in completely coincidental fashion. You might notice your old classmate from three countries away is now your waiter in a place you had no reason to expect them in, and you might say “wow, what a small world”. You might notice two people who you know from completely different spheres miraculously know each other. You might recognize by chance that your penpal has made a cameo at a venue you’re at.
But what was your most profoundly coincidental encounter?
I live in NYC, which I describe as the biggest small town in the US. I frequently run into people I know out and about. Since most people travel by public transit, it’s only a matter of time.
Public transit in NY moves literally millions of people per day, so the chances are still pretty low.