I mean, that song was never not going to be in the movie. It all starts there, with that weird moment of synesthesia – it wasn’t even “Oh, I know this will be the opening of a movie.” It was just something that appeared to me when I heard the song. But over the years, I had this sequence, and I knew it was the germ of something but I didn’t know what.
Then I thought: What if the getaway driver is listening to that track? Suddenly, it was the starting point for some sort of diegetic action-musical … taking what I love about the movies of Tarantino and John Landis and Scorsese and putting it into one full movie. Or American Graffitti, which is really the first diegetic musical. It’s one of the first movies I can think of where the pop soundtrack really isn’t a score – it’s all coming from whatever people are listening to onscreen.”