The cameras were a little twitchy, and you'd get less footage and less set-ups every day. The interesting thing about it was that you just composed images in a completely different way because we had big 3D monitors on set, and you'd wear the glasses and see the image in 3D.

There was a lot of pressure on me as a filmmaker to raise the bar and do better than before so, you know, I put a lot of thought and energy, that's for sure.

When you're writing it's a very solitary job. It's you and your word processor and a cup of tea. It's nice- that again, is another nice thing about being able to do commercials is, you can get out of the house and chase high speed cars around for a few days and then by the time you go back, you're kind of re-infused to write.

Interestingly it's when you come to the comedy, that's where a lot of the discussion is. It's like ten people sitting around talking about what is funny. "Is that funny? Is that funnier than that? Is this slightly funnier than this?" I guess that's what it's like when you're making a comedy movie as well, you just have to sit around talking seriously about the nature of comedy.

3D is very exciting. I love it. I'm a complete convert. Everything for me, from now on, is 3D. I'm completely convinced it's the future of home entertainment, as well as cinema entertainment. I think it's a paradigm shift, in terms of cinema, and those things don't happen very often. The introduction of sound, the introduction of color photography and now 3D have been the big shifts. They happen once every 40 or 50 years, so it's very exciting to be a filmmaker, working while one of them is happening.

If you work with any new technology, you have to expect that it's going to be a little problematic.

For me, it's a multitude of things. In the modern world, there's a real genuine fear of loss of individuality and I think the undead speak to that. I also think the idea of the dead coming back to life, and this unstoppable foe that just keeps coming and coming, but rather slowly just chases you, is a real primal fear. It's like a fear of claustrophobia, heights or water.