The song carries you through the whole transition and thought process of PSH's Character.
It reminds me alot of this other great use of a song to show the internal thinking of a character. The Jesse's Girl Scene in Boogie Nights (and the 99 red ballons that follows).
I thought the recent sharp objects miniseries did this excellently. All the scenes where she's driving around playing cassettes from high school were perfect, and the songs cutting off whenever she arrives somewhere add to the effect.
12. "RE: György Ligeti - Musica Ricercata" In response to Reply # 11
funny, i was just thinking of that movie in relation to this topic but not that scene. i rewatched this just last month and was struck by the opening of tom and nicole getting ready to go out while this great classical music plays, not out of place in a kubrick movie but not typically used in a diagetic sense. after a few minutes, tom turns off the stereo, revealing this is what the character actually listens to.