some months ago, someone sent me a link to this magic ball thing that kinda guesses numbers that you're thinking, and i was like all wowed by it because i couldn't figure out how it did it, i thought it was pretty cool, check it out http://www.exstatica.net/flash/psychic.swf
well tonite i went back to it and was still amazed by it, so i actually ran across a site that tells you how it works. and i was like duh.
http://artlung.com/words/flash-psychic-proof/