I was at a company picnic for my son's work, and the owner had a friend there whose sideline was magic, to entertain the guests. Card tricks, coin tricks, sleight of hand, that sort of thing. He was pretty good. I was chatting with him and found out his regular job was with the post office. I teasingly said to him, "Oh, is that where you learned how to make things disappear?"
He didn't laugh. Didn't even smile. I said, "Oh, I bet you hear that all the time." He said, "No. That was the first time."
I smiled and backed away slowly.