Ennio Morricone is a movie legend who completely redefined the Western genre with his 'Spaghetti Western' scores. For 'The Good, the Bad and the Ugly,' he used the Jaw Harp (or Jew's Harp) to create the 'boing' sound that accompanies the characters. The Jaw Harp is a small metal instrument placed against the teeth, where the player plucks a metal reed while changing the shape of their mouth to act as a resonator. This 'low-brow' folk instrument, combined with whistling and electric guitars, gave the film a gritty, cynical atmosphere that matched Clint Eastwood’s legendary performance. It broke the Hollywood tradition of using grand symphonic orchestras for Westerns, proving that simple, quirky instruments could create a cinematic legend that is still parodied and celebrated today.