A factory manager found that production was being hampered by the tardiness of his people returning from the lunch hour. When the whistle blew few were at their machines. He posted a sign by the suggestion box offering a cash award for the best answer to this question: "What should we do to ensure that every man will be inside the factory when the whistle blows? "Many suggestions were submitted, and the one that was selected solved the problem. But he manager, a man with a sense of humor, liked this one best, though he could not use it: "Let the last man in blow the whistle."