Back when DOS 2.0 was released I worked in a ComputerLand store to support the sales team (technically). I learned how to use the DOS debug editor to modify error messages in COMMAND.COM. So instead of displaying "Invalid DOS command" at the C prompt, DOS would display my replacement strings, like "Try again stupid". Since sales people rarely typed DOS commands correctly, I could count on a good laugh. One day I (ok I was young at the time) used replacement strings that included a bit of profanity, which were discovered by a sales person giving a demo to a customer. I found other ways to amuse myself after that.

John Ward

I never make the same mistake twice...I'm too busy making new ones!