The Boondock Saints
Duffy moved to Los Angeles in his twenties to pursue a music career with his band, The Brood. While seeking gigs, he worked at a bar where he wrote the script for the film "The Boondock Saints" during his break periods. The inspiration for the screenplay happened one day when he came home from his job to find a dead woman being wheeled out of a drug dealer's apartment across the hall. Duffy then rented a computer and wrote the screenplay for "The Boondock Saints" based on his disgust at what he saw: