Doing a good job at work is like wetting your pants in a dark suit.
You get a warm feeling, but no one else notices.
A receptionist said to the psychiatrist, "A man is out here who says he is invisible."
The doctor replied, "Tell him I can't see him right now."
What's the difference between a teacher and a train?
A teacher says "Spit out your gum," and the train says "Choo choo choo!"