This week is finals week. Always a week of stress and little sleep. Perhaps this is an example:
Today I was walking down the hall toward my office five minutes before the first final. I passed a girl sitting in the hallway. She said, "Good luck." She was very friendly and smiled.
Smiling, I said, "I'm not taking a final. I'm a teacher. But thanks anyway."
She explained why she made the assumption that I am a student. I smiled and said thanks again, then walked into my office.
I found it humorous. I hope she does better on her finals than she did in the hall... that is... assuming she is a student who has finals this week.