The Four Horsemen whose Ride presages the end of the world are known to be Death, War, Famine, and Pestilence. But even less significant events have their own Horsemen. For example, the Four Horsemen of the Common Cold are Sniffles, Chesty, Nostril, and Lack of Tissues; the Four Horsemen whose appearance foreshadows any public holiday are Storm, Gales, Sleet, and Contra-flow.
Terry PratchettFunny, reely," he said. "You spend your whole life goin' to school and learnin' stuff, and they never tell you about stuff like the Bermuda Triangle and UFOs and all these Old Masters running around the inside of the Earth. Why do we have to learn boring stuff when there's all this brilliant stuff we could be learnin', that's what I want to know.
Terry PratchettSomeone out there was about to find that their worst nightmare was a maddened Librarian. With a badge.
Terry PratchettDeath: Human beings make life so interesting. Do you know, that in a universe so full of wonders, they have managed to invent boredom.
Terry Pratchett