The score by Ennio Morricone is central to the film's identity, featuring the famous "Sean Sean" motif.

The story focuses on Juan blackmailing John into helping him rob a bank, only for them both to become unwilling heroes of the Mexican Revolution after Juan’s family is killed by the Governor's army. The Iconic Soundtrack

The main theme, often referred to as "Giù la testa" or "Sean Sean," is characterized by its distinctive vocalizations and melodic score .

The music uses recurring motifs to deepen character psychology, particularly John’s internal anguish.

Arrangements for piano and mixed ensembles are widely available for those looking to perform the piece. Translation & Context

The film is also known internationally as Duck, You Sucker! and A Fistful of Dynamite .