For those who are unaware what a Zombie walk is, in essence, exactly what it sounds like: A bunch of people dressed up like zombies walking around San Antonio. The event has taken place since 2007 and promises to be a rip-roaring good time if dressing up like a zombie and walking around while groaning !braiiiinnnsss! is your thing. Its free, so if you dont have anything to do on Sunday night, you may as well stop by and take part, and B.Y.O.B. (bring your own blood).