At Knott's Scary Farm in Buena Park, California, guests are outfitted with neon-green laser guns and ordered to shoot actors portraying zombies by aiming at their heads. "After 20 years of haunted houses with people stepping out and saying 'boo,' these days if you're really trying to scare people you've got to be edgy and out of their comfort zone," said Simmons. Anarchy, which is the sequel to a movie about an annual night of unfettered crime and violence, is just one of the inspirations for Halloween Horror Nights at Universal theme parks in Orlando, Florida, and in Los Angeles. The events feature hundreds of elaborately costumed actors and Hollywood-quality sets, special effects and mazes inspired by pop culture influences ranging from El Rey Network's "From Dusk Till Dawn," to AMC's "The Walking Dead." 13th Gate, Baton Rouge, Louisiana; Netherworld, Atlanta; House of Torment, Austin, Texas; The Darkness, St.