This is probably not an easter egg, it is more like a poorly worded error message. Once when working on a tricky vi, I inserted a dialog box with the words "Oh Sh*t" -without the * - in a case that was never supposed to execute. Several years later after making a minor change in the software, my customer called me and said "Your program said Oh Sh*t". It worked out OK, but I am more careful about things like that in my software.