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.

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.

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.

I was excited about the fourth movie I guess conceptually because, what I felt we should do it, we should try to make it a conceptual jump like Terminator did to T2. It was still the Terminator franchise, but it was something kind of bigger and grander.

The way it works in commercials is they come to you with the script and then you do the visual, you do the storyboards, and you give your vision of it, but it's very much their baby. You just kind of put your polish and sheen on it, and you're interpretation of it, but it's very much the agency's idea.

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.

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.