The bookstore is in the same town I went through school in, so bumping into people I knew in high school is a pretty frequent occurrence. (Though it never fails to freak me out a little.)
Tonight, as I was working there, a guy came up to ask me to help him find a book, and I was halfway through realizing he was kind of attractive, when we both simultaneously realized we knew each other.
It was a guy I graduated high school with… and actually he was in my first grade class too… We never really talked much in school, but we caught up briefly as I showed him the section he was looking for. He seemed nice. It was… surreal?