Frankenstein comes from Mary Shelley's 1818 novel and the classic Universal horror films that made the stitched monster and his creator part of popular culture. The dun dun dun part is not a line of dialogue but a short dramatic sting long used in radio, cartoons and horror parodies to mark a terrible revelation. Online, editors pair the two ideas for Halloween edits, mad scientist jokes and mock-serious reveals, in the same family as the longer dun dun dunnnnnnnn sting used for suspense.