The Live Wire

http://www.youtube.com/watch?v=_lnogpRPvY4

It's tool-assisted, but holy fuck. Over 3 million rerecords. Legitimate rerecords, too - he actually loaded states over 3 million times to get the desired results here (though with help of a bot in a few spots, but even for a bot this is an impressive number), saving well over 3 minutes over what was previously thought to be the best run possible before.

Just...just watch it. There are no words to describe the insanity in it. None.