Calls to mind leaving silly messages on the dot-matrix LED display of an HP LaserJet 4 printer... some of my favourites to leave were: "17 COLON BLOCKED" (17 was the error code with no error associated) "INSERT 25 CENTS" "WARP CORE BREACH" Colon blocked turned out to be too plausible, though, and people ended up coming to me with very concerned expressions. Oh well.