What happened with Final Destination was that the movie was in post-production for a long time and I think they changed a lot of the deaths, so a lot of those things were last-minute additions. Everything we shot is in the movie and it's all been designed. We didn't change anything. It's been a year of making those things happen, exactly as we had pictured them.

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.

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.

We've been working on the visual effects for a year, so we're trying to raise the bar. Stuff will absolutely come out at the screen, but it will absolutely not look as bad as that tire in Final Destination.

So each of the commercials- basically it's an action movie cliché. "Bus" is very much inspired by Speed obviously, where you have a high-jacked out of control bus, and you have heroes who are trying to jump from a moving vehicle to the bus and they just can't do it because the moving vehicle can't get close enough, because all these VW cars have this distancing technology, which is really fantastic.

It's all based around the idea that basically VW cars are space age. They're the worst cars to use in action movie, because all the things you want to traditionally do in an action movie they won't allow you to do, because they make you drive safely if you want to or not.

There's something very terrifying about that and very primal about it. It's my belief that what horror does for people is that it provides that primal fear that, when we were wild hunter-gatherers, we had as part of our natural lives because maybe something was trying to hunt and gather you as well. We don't have that anymore in life and that's one of the things that horror films and action films provide for us.