Dust in the Wind?

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?

OUCH!