I know that I date myself but I am beyond caring and enjoying my memories of them DOS Days! What I recall is that there was a series of computer cartoons featuring animals and these common DOS prompts. Obviously this "Hit any key ..." was one and another fave was a ¿bear? giving a heartfelt answer to "Please enter your response". That was a fist through the Monitor (CRT) with miscellaneous parts flying out the back! Two of a series of an unknown number by a very good cartoonist!