@CalamityJane,
I used to work on the sixth floor of a fourteen (I think) storey office building.
The whole building was occupied by one company and people changed
departments pretty easily. It was common to see someone you'd worked with
before and ask about their current project.
We also had an active running community and you'd see guys taking the stairs
rather than the elevator and taking them at an aggressive pace. I was one of
those who ran up the stairs.
So one day I'm going upstairs at a quick pace as Bill was coming down.
"George, what're you working on?"
"My quads, mostly."
Bill burst out laughing and it took me a while to figure out why.