An actual conversation I had a little over an hour at the grocery store with the store manager, who was running the checkout register at the time.
MANAGER: (yawns & laughs) Sorry.
ME: (laughing) That's how I was in Algebra this morning.
MANAGER: (eyebrows shooting skyward) Oh. You teach Algebra?
ME: No. I take Algebra. I'm back in school.
MANAGER: (pause) Are you the oldest in your class?