I linked to the Insultingly Stupid Movie Physics website a few days ago and The Meatriarchy picked up on it and added his own extensive thoughts (permalink isn't working, so scroll down the page about halfway) on fighting in movies.
Well worth reading -- I intuitively suspected much of it, but I'm not one with a lot of experience fighting (remind me to tell you about my one-and-only fight sometime), so it's nice to get the opinion of someone with martial-arts experience.
In fact he should consider sending it to the folks who run the ISMP website, as I don't think they really addressed the subject.