Well... After listening a couple times, I'm pretty sure they're not actually the same set of notes. And even if they were, it's more likely coincidence than no

Well... After listening a couple times, I'm pretty sure they're not actually the same set of notes. And even if they were, it's more likely coincidence than not: the musical effect Glass is going for relies on a particular progression which just happens to partially overlap a phrase Mahler once used. Meanwhile, if you want soundtracks which shamelessly quote classical music... * That awesome sequence in "The Matrix" where Neo's distracted by the woman in the red dress? The soundtrack gives you Rob D's "Clubbed to Death", but that's just the theme from Elgar's "Enigma" variations with a bass line. * Listen to the score from "Gladiator". Then listen to "Mars" from Holst's "The Planets". In fact, this works with almost any action/war movie. * Disney does it too: "Once Upon a Dream" from "Sleeping Beauty" is... well, a melody from "Sleeping Beauty" the ballet, by Tchaikovsky. * A 1950's musical produced a hit song, "Stranger in Paradise". It's a melody from Alexander Borodin's opera "Prince Igor". etc., etc.