The Zeppelin canon is full of mysteries, but none greater than this: How can a song about flower people and Tolkien be so crushingly funky? Jones' humid electric piano locks in with Page's headlong riff and Bonham's slippery avalanche of a groove, as Plant evokes a fracas between cops and hippies that makes him want to escape to the fantastical peaks alluded to in the title. Plant later said the lyrics were about "being caught in the park with wrong stuff in your cigarette papers."