I like to stand in front of those souvenir penny smashing machines and tell people who walk up, "You know, there are machines that can smash people too."
I don't sing "Happy Birthday" to myself while washing my hands to ensure I lather long enough, and I have no patience for people who do. You are a time waster in my opinion.
When someone shoots a basketball from a short distance and makes it, I say straight to their face, "No range, no change!" and keep the ball for myself.