"A Fistful of Dynamite," also known as "Duck, You Sucker!," is a 1971 film directed by Sergio Leone. It blends elements of the Spaghetti Western and political commentary, focusing on the friendship between a Mexican bandit and an Irish revolutionary during the Mexican Revolution. The film is praised for its cinematography, score by Ennio Morricone, and Leone's signature style. While it may not be as popular as Leone's "Dollars Trilogy," it has a dedicated following and is considered a worthwhile watch for fans of the genre and director.

"Duck, You Sucker!" is also known as "A Fistful of Dynamite" and is not part of the official "Dollars Trilogy" by director Sergio Leone, which includes "A Fistful of Dollars," "For a Few Dollars More," and "The Good, the Bad and the Ugly." Instead, "Duck, You Sucker!" is considered a stand-alone film and is part of Leone's later works, often referred to as the "Once Upon a Time" trilogy, which also includes "Once Upon a Time in the West" and "Once Upon a Time in America."