2011 Mexico City Zombie Walk
The organizers of the 2011 Mexico City Zombie Walk claim that 9,600 participants dressed up as zombies marched the city on November 26th 2011.
If true, this means Mexico City will pick up the current world record for the highest number of people dressed as zombies.
Last year, 4,093 zombies showed up in New Jersey, so Mexico City has apparently doubled this previous record which is pretty amazing.
Check out the Flickr set available.