Last week, A24 pulled an elaborate Halloween fake-out with the first teaser for Jeremy Saulnier’s “Slayground.” The cryptic spot looked like the start of a campaign for Saulnier’s new film—formerly known as “October”—but instead pointed viewers toward what seemed like a real Slayground haunted-house experience. A24 even released a tongue-in-cheek participant waiver warning visitors about everything from “extreme fear” and “fight or flight” to loss of consciousness, seizures, and, rather ominously, heart attacks.
