The zombie zeitgeist is in full swing, spawning hit movies, best-selling novels and immensely profitable video games. Every city worth its salt has an annual zombie crawl, where zombie fans dress up as the undead and walk, en masse, among the unsuspecting populace. Denver, being particularly salty, has one of the biggest zombie crawls in the nation. The event celebrated its fourth year with a huge turnout — some reports put attendance at more than 4,000 zombies — and even those who didn't want to dress up as the walking dead could participate by marking themselves as allowable victims via duct-taped Xs on their clothes. Whether the eaters or the eaten, everyone had a good time, and word is that 2010 is a go for the fifth iteration. Watch your brains.