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.

LSD caused a lot of experimenting going on. And we're thinking, 'Wait a minute, what if we've got...' I always thought, 'What if some of those experiments actually had worked?' And what if they did? We probably wouldn't know that they existed. We heard that they were shut down, but we probably wouldn't be told if they succeeded.

Just movies in general. It's such a wonderful business as much as you feel, you are fine tuning your craft, every movie is a completely different challenge. Every fight sequence is different. Every action set piece. I enjoy that.

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.

So the question never comes up. I love to work with actors who I feel really confident in knowing what I'm going to get from them. And making a movie is such a risk that it's comforting to build up a good support team in production as well as cast.

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.

Some people will always be disappointed.