From "The Shawshank Redemption", when he barricades himself in the office and puts on the record with the duet of the Countess & Susanna from "The Marriage of Figaro" and blasts it over the speaker into the prison courtyard. Or the theme from "Gone with the Wind" at the end of the first half of the movie where Scarlett is standing under the tree looking at what remains of Tara.