Everybody knows ZIP files. It’s what comes out when you compress something on windows and on OS X. It’s the commonly used format to store and exchange compressed data.
Now there’s a lot of things you can do when you know file formats, especially those with many algorithms involved, inside out. There is a lot of text explaining the ZIP file format, like this one.
With that knowledge it is possible to create a valid ZIP file that never ends. You might already know ZIP bombs bit this one is a different animal. You computer won’t stop decompressing…
Source 1: http://research.swtch.com/zip
Source 2: http://steike.com/code/useless/zip-file-quine/
Source 3: http://en.wikipedia.org/wiki/Zip_bomb