As the other review stated, the two-note theme of this score is repeated throughout, echoing the two main characters (if you will), almost revolving around each other like a binary star. As with his other great themes, like those of Requiem For a Dream, and The Fountain, the emotional tones stay with you long after the movie ends. Here, Clint manages to make tangible the feeling of desolation and loneliness that pervades throughout the first act of the film. It's almost as if you're inside Sam's head, losing your sanity along with him. I love that this score was done by Mansell almost entirely alone, just him and his piano, as he usually collaborates with the like of Kronos Quartet, or bands like Mogwai. Here, it's just Clint and his keyboard, which reinforces the feeling of isolation, and illustrates the genius this man is capable of. I highly recommend seeking out his other soundtracks, as they are almost all worth owning.