Simon Pegg, co-writer of the go-fucking-watch-it movie Shaun of the Dead, on why zombies shouldn’t run:

[T]he fast zombie is bereft of poetic subtlety. As monsters from the id, zombies win out over vampires and werewolves when it comes to the title of Most Potent Metaphorical Monster. Where their pointy-toothed cousins are all about sex and bestial savagery, the zombie trumps all by personifying our deepest fear: death. Zombies are our destiny writ large. Slow and steady in their approach, weak, clumsy, often absurd, the zombie relentlessly closes in, unstoppable, intractable.