A walloping drum and bass, reminiscent of The Pretenders' Mystery Achievement, kick off this righteous earthshaker in which Auerbach, sounding beat-up and broken, softly croons, "So long, why'd it take you so long?/ Every time I hear the whistle blow, I'm down below, you're gone."

The chorus, backed by handclaps, is vaguely Motownish, and it whips you right along merrily. Auerbach turns in a robust guitar solo, quickly overtaken by fuzz bass. The juxtaposition of so many genre-specific elements would result in a clusterfuck of confusion in lesser hands. But The Black Keys aren't just applying colors willy-nilly, they're letting you in on feelings. And because they're ruled by their emotions, there's a human connection one makes to their many splendored sonic hues.