People like that don't need a reason apart from "because I can". They have a nightmare and try to make it happen.
Terry PratchettThe three rules of the Librarians of Time and Space are: 1) Silence; 2) Books must be returned by no later than the date shown; and 3) Do not interfere with the nature of causality.
Terry PratchettStudies have shown that an ant can carry one hundred times its own weight, but there is no known limit to the lifting power of the average tiny eighty-year-old Spanish peasant grandmother.
Terry Pratchett… people didn't seem to be able to remember what it was like with the elves around. Life was certainly more interesting then, but usually because it was shorter. And it was more colorful, if you liked the color of blood.
Terry Pratchett