Disney sound artist Jimmy MacDonald created these swishes for the 1944 Donald Duck short Contrary Condor, where fast, fluttering movement needed a sound that felt both light and frantic. The effect was later catalogued by Hollywood Edge as a rapid swish, which put it into the hands of film, television and online editors long after its cartoon debut. It survives because the flutter is instantly readable: listeners hear hurried, flailing motion even without seeing the picture, making it a handy shorthand for panic, effort and cartoon chaos.