I just watched Serenity with Joss Whedon commentary on today, and there's one point in the movie where the Operative (the main villain) sits down in a chair to negotiate with Mal, the main character. He sits and says, "I am unarmed." Mal replies, "Good," takes out his pistol and shoots him before walking away. Of course, he was wearing body armor (why the hell didn't he shoot him in the head?!) so he wasn't dead, but it was still pretty cool. In the commentary, Joss says, more or less, "Including this, Mal shoots a total of three unarmed men in this movie. Besides being a response to the Greedo confrontation in the revised Star Wars, it's also to show that Mal isn't quite your traditional hero, and he'll do what he has to do..." etc, etc. The first time, I didn't even listen to the explanation. As soon as he made that quip about Star Wars, I immediately ran it back and watched again. I was laughing so hard!