Scooby-Doo first appeared in the Hanna-Barbera series Scooby-Doo, Where Are You! in 1969, and its chase scenes became a defining part of the show. The running patter fits that tradition of exaggerated cartoon sound design, where frantic movement is made funnier by rhythm and speed rather than realism. As clips from classic cartoons were reused in memes and short edits online, this run sound found a second life as a reaction effect. It now signals a hurried, cowardly or comic escape in almost any context.