at the beginning of the first Star Wars, why doesn't it cauterize the wound and instead spills blood all over the floor? I'm guessing it's because this wasn't a decision they had made back then, and only after that scene did they think that no blood would be more appropriate. If this is the case, I'm also sure that some Star Wars nerd went back and retconned the scene to make sense. Like, he was some special sort of alien or something. Fill me in.