I use the elevator in Smiddy, a building on campus, because I literally have no idea where the staircase is past the second floor. So I guess sooner or later I was bound to get off on the wrong floor without realizing it.
I was looking at something, I think a receipt for the document on which I log my hours for TAing, as I walked off after the elevator stopped. Just as the doors closed, I looked up and around, wondering where the hell I was and why I heard a very loud man with a German accent, speaking to his class as it turns out. Oh, so this is what the third floor looks like, I thought.
I should really figure out where that staircase is.