The slide whistle has long been a staple of cartoon sound design, with its rising and falling pitch mimicking exaggerated movement in a way audiences instantly recognise. Effects in this style became closely associated with Hanna-Barbera cartoons, whose playful, economical soundtracks helped define how animated comedy should sound. Later, the effect moved from television into online video, where editors reuse it as a quick shorthand for silliness, clumsiness, or a sudden change of direction.