Fall '09, I had just been initiated when I went home one weekend for a gathering of my HS classmates. I was wearing a philanthropy shirt with ΣΣΣ on the front when we all went to our HS's football game. I ran into my art teacher there (one of my favorite teachers during HS) and when she saw my t-shirt she said "Are you a Tri-Sigma now? I was in Sigma in college!" It was amazing; it still just makes me grin, thinking about it.
Another story isn't mine, but one of my Sisters (Katelyn). She's from Michigan and was flying back to SC from home after winter break last year. There was an issue before take-off (I don't quite remember all the details, but I think it had something to do with an unruly passenger?) and Katelyn and another girl were both lucky enough to be moved to first class. As they were both sitting down, the other girl noticed Katelyn wearing letters. She turned out to ALSO be a Sigma who went to school in Michigan!
Gotta love stories like that. Small world, huh?