Jinkies!
Met a girl while exploring a creepy abandoned insane asylum at 3am. We were both there with separate groups, neither group was aware of the other group’s presence but we kept hearing one another moving around and scared half out of our minds because we each assumed the other was crazed hobos or criminals using the place as a hideout or something.
Anyway our groups kept getting closer and closer to one another while trying to figure out how to get out. I turned a corner, saw a face, and nearly brained this poor girl with the baseball bat I was carrying before I realized it was just a bunch of scared college kids same as us. We had a good laugh about it, me and the girl hit it off, and ended up dating for a couple of years.
Story credit: Reddit / KongUnleashed