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.

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.'"

When I started doing television, I thought that I would change the way that I shot, the way that I blocked, and the technical side of it. You're not going to change your relationship with the actors or how you approach the characters. That wasn't any different.

I love helicopters. In fact, my wife and my friends, the myth of the chopper in the sky is that Len's going to stop and look at it. I love, probably, destroying them, yes. You know, It's the big elements, the big toys, the trucks the helicopters, and things like that. You have a few tools to play with.

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.

There are plenty of directors who work with the same actors over and over, many more times than I have. Like I have worked with Bill Nighy more times than I have worked with Kate, but I'm not married to Bill Nighy.

I had no intention of replacing Arnold [Schwarzenegger]. There were a few things that made me want to do the movie. They were the script which had a different direction to it, and it was a chance to do a very different Quaid. I didn't read the short story until I went to college.Reading the story had a different effect on me of how I pictured him to be and the tone of the story was different. In the story, he's a bit more of an everyman.