These sorts of "exploits" have also been used in Pokemon and other games for extremely fast tool-assisted speedruns:

http://www.youtube.com/watch?v=3UnB1fomvAw (Pokemon Yellow)

http://www.youtube.com/watch?v=VDx6gzvLqWs (Super Mario World)

http://www.youtube.com/watch?v=7CvJqzYpWms (EarthBound)