From Krux on THCNET: "Ok, I admit it.. I was bored. So I came up with a cool way to finally make an interactive 404 error... For those of you who remember, Dungeon or "Zork" was one of the first, and is considered to be the all time classic of text adventures. The source code was made publicly available, so I thought a PHP version would be cool... So today I had the idea, why not just pipe the input and output? After a couple tweaks to the original code, I had something that I could interface to PHP. Check it out, it's cool."