The siren is associated with The Purge, the dystopian horror franchise launched by writer-director James DeMonaco in 2013. In its fictional United States, an annual twelve-hour period permits most crimes, and an emergency-style warning marks its commencement. The signal became one of the franchise’s most recognizable audio cues as the concept expanded through film sequels and television. Online, creators continue using similar clips as shorthand for approaching chaos, especially in horror edits, Halloween videos, gaming scenarios, and darkly comic posts.