Unless you're one of the people who sat through Cloverfield's end credits, the only sounds you heard were party noises, followed by screams of terror and pain during the monster rampage. But if you stuck around, you heard Michael Giacchino's 12-minute overture titled, "Roar." The song is now available on itunes for a mere $1.99. Youtube of the music after the jump.

It's your classic monster movie score with operatic voices, rolling military snares and super ominous booming brass. John Williams, eat your heart out. Giacchino is also slated as the composer for Abram's Star Trek and penned the music for Speed Racer.