In life, you know, they do this in focus groups; if you were in such and such circumstance, what would you do? Well, you never know what you're going do unless you're faced with it.
I quite like post-apocalyptic films, things like 'Mad Max' for instance, because they are so full on and there is something quite cleansing about the post-apocalyptic because you can see where we all think we're heading.