http://www.youtube.com/watch?v=yG7nfjTVhfA That's not my video, but that is what is happening to my macbook. usually happens when i'm playing flash video. my applecare is expired so i'm hoping there is either a way to fix the problem myself or apple is kind enough to fix it for free. this seems to be a common problem but i looked around the net and couldn't find any solutions. thanks for any help! also, please don't link to this: http://nathanspipe.blogspot.com/2008/03/macbook-fan-noise-solution-or-solved.html tried it and doesn't work.