"The Dark Knight kicks off with what is believed to be the Joker's new "theme." The first track, Why So Serious? scores the opening sequence, and it is mostly a loud siren noise underscored later with a pulsing beat. Nothing too original or memorable there. It definitely throws things off-kilter a bit, fitting of the Joker, but you can't help wondering if another composer could have created something much more effective. It's 9 minutes long and pretty repetitive.