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.

It's more going back into, I've always been really interested in the MKULTRA program and some of the programs and the fact that we really tried to create an actual, I guess you could call it an energy force of yourself. And you know, there were test subjects that were killed during the process. It have a huge ordeal, this huge congressional hearing that shut the whole thing down.

Some people will always be disappointed.

A lot of these movies are informed by the movies that come before them.

Science fiction is an extension of science.

A lot of people don't put the numbers together correctly. But Underworld, honestly, the way it came about - the real way it came about - I took a meeting with Dimension, and they were looking to do just a werewolf movie, and I wasn't too interested in doing just a werewolf movie.

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.