I was at a magic show, when after one particularly amazing trick, someone screamed out, "wow, how did you do that." I would tell you", answered the magician predictably, "but then I'd have to kill you." After a moments pause the same voice screamed out "can you tell my mother in law?"
Law of employment: When leaving work late, you will mostly go unnoticed. When you leave early, you will meet your boss at the parking lot.