"That was the Blue Velvet town that they're in or any of those Edward Scissorhands or whatever, that psychedelic version of suburbia. This is another Getty Images find. We thought 'Right, what can we do?' and we saw this beautiful supermarket shot from the '60s.

"There's a paperboy making his rounds in the morning who's in a perfect white outfit and he's cycling down a perfect white suburban street chucking the newspapers on the different lawns and as he drifts by one of the houses is on fire.

"There's a chunk taken out of it and it's burning and that's one of the initial clues that something airborne has passed through this neighborhood. So we were trying to use the psychological aspects of the way we see things as well as the very explicit visual explanations of what's going on. And suburbia has that.

"There's some element of disquiet to it, I think. They are mildly curious but their resolve is that of middle England or middle Australia. Their gardens are always perfect and so are they, but at this point the pig has visited them and punctured their farm silos and ripped through their supermarket and ended up scudding to a halt in their street."