It was practically with people with strings. There was no CG involved, it was just painfully taking Collin [Farrell] and Jessica Biel and putting them upside-down, we built the set upside-down and just try to twist perspective to make it all seem like zero gravity. And it was one of the most difficult things I've ever shot.

Science fiction is an extension of science.

So I was drawing in a lot of the habit district in Brazil, put that together with an Asian influence, so there are a lot of different things in terms of architecture which assisted in the construction. Then every sci-fi movie I've grown up with from 'Blade Runner' to 'Aliens' and 'Star Wars.'"

I wanted to do something that dealt with more of paranormal techniques that wasn't a horror movie. It is an action movie that deals with a special operations group. But if a Tier One team went in to take out Bin Laden today, if you had those kind of abilities, of course you would use that kind of group. And it was more going into that arena. And I wanted to make it feel more like, grounded, as if we had this ability.

I would love to travel to the future to plot out some things so there's no more guess work.

With Die Hard it was just something that I, you know, I grew up with those movies. I made a Die Hard movie with my friends in my backyard during high school. It was terrible.

The class warfare was in the script as well. It establishes what the world is like and what would happen if we really had two zones that were left and everybody had to survive using these two areas. What would our society to do with that set up? I wanted the state of world, in my mind, how it would actually realistically unfold. I drew that from what was in the script.