Known in Turkey as salyangoz korna, this is an aftermarket air horn, including the HD200A model, fitted to heavy trucks such as Volvo, Scania and DAF. Its loud, sustained blast made it a favourite among truck enthusiasts, whose horn videos and compilations spread the sound beyond trucking circles. Meme editors then adopted it as a dramatic entrance cue, using the recognisable blast to signal size, confidence or comic exaggeration in short videos.