Preston's 133t Easter Egg.
According to webopedia.com, an Easter Egg is "a secret message or screen buried in an application. Typically, easter eggs are used to display the credits for the development team or to display a humorous message."
While self-serving, Preston's little stunt is not that far-fetched when compared to the Spy Hunter game embedded in Excel 2000, for example! For those interested, there are a few sites on the web devoted to the topic of Easter Eggs.