The main jokes in this film are about big things, love and life and zombies - we all get that.

I used to lie in bed in my flat and imagine what would happen if there was a zombie attack.

Plainly it isn't an exact science, despite it being a complex interaction of micro-decisions and corresponding thought; perhaps it doesn't always work and we pass by some potential soulmates like the proverbial ships in the night, never quite connecting. Then again, perhaps the system is tenacious and continues to run like a computer program on infinite loop, so that if at first you don't meet, you are drawn back together for another try.

It's why I get miffed at all the dashing around in recent zombie films. It completely misses the point; transforms the threat to a straightforward physical danger from the zombies themselves, rather than our own inability to avoid them and these films are about us, not them. There's far more meat on the bones of the latter, far more juicy interpretation to get our teeth into. The first zombie is by comparison thin and one dimensional and ironically, it is down to all the exercise.

We realised that it was important to embrace this popcorn logic, that it works, that it's funnier when you fire 20 rounds from one tiny pistol. Then it becomes the joke, it's funnier when you pay less attention.

We've kind of grown up in a post-Star Wars era, and what Star Wars did to cinema, in terms of an explosion of that kind of blockbuster culture. It's thrown up a generation of geeks. With the evolution of computer games and the Internet, that's all impacted on us as a generation, and affected the creative element of that generation enormously. So whereas the different schools of filmmaking...

Ultimately, we are all products of the experiences we have and the decisions we make as children, and it remains a peculiar detail of human condition that something as precious as the future is entrusted to us when we possess so little foresight. Perhaps that's what makes hindsight so intriguing. When you're young the future is a blank canvas, but looking back you are always able to see the big picture.