Would you want to survive the apocalypse? Isn’t life hard enough already? From Soylent Green through to Waterworld the worst part of the apocalypse is surviving it. Where would you propose to buy your dental floss after Armageddon? Who would, in the immortal words of Joyce Grenfell, clean the drains? The apocalypse isn’t sanitary. It doesn’t care that your under-arms would smell. And besides, who’d have time to worry about personal hygiene with zombies and lord-knows-what-else on the loose? This (the zombie part) is the dilemma that confronts Will Smith in I Am Legend. He copes better than most of us would, but still – post-apocalyptic life is bleak.