I think it's all a matter of how many things you have in a movie. I find that one of the things with writing these movies is that they start off incredible complicated, and then I have go, 'Uhhhh' and cut some of this great stuff... So often times there's a lot of different elements, whether it's scenes or characters or cameos or whatever, you end up cutting down, down, down, down until you get to what the movie is. Because there's an elegance in the simplicity that's incredibly important in these movies, because they are complicated! They're in outer-space, we don't know where they are, there's a lot of characters, so how do you cut that down to what the most necessary components of the stories are?