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The casting choices in "Pulp Fiction" were critical to its success. Initially, the character of Butch was envisioned as a young, rising boxer, with actors like Sylvester Stallone and Matt Dillon considered for the role. However, Bruce Willis ultimately secured the part, showcasing how Tarantino's agile writing evolved through the casting process. Travolta’s preparation for his role included consulting a recovering heroin addict, reflecting Tarantino's commitment to authenticity in his characters. The inclusion of a tequila routine to mimic the sensation of heroin usage is a testament to the film's dedication to capturing the complexity of addiction without glorifying it.