The Exorcist, released in 1973, remains one of the most influential horror films ever made, with its story of a possessed young girl becoming shorthand for demonic horror in popular culture. Reversed speech has long been linked to that world because it sounds familiar yet impossible to understand, a trick horror creators have reused for decades to suggest an evil presence. Online, short clips of this backwards voice now circulate on soundboards and in video edits, where they are instantly recognised as a cue for possession, curses and haunted scenes.