probably something like The Lord of Ring: Gollum™'s 150 megabyte test texture (the uploaded version the wiki, full size, is about 200 KB, to give you an idea of how ridiculous it is)
developer rants in any amiga or commodore 64 or, really, pretty much any of those weird little computers. frequently completely unhinged
but...
there's a handful of real fucked up shit under the "Not safe for life" category. I am not linking that for obvious reasons. the NSFL tag is used on something like 5 pages, total, and they're some of the most fucked up shit.
