But that's kind of the point; Green Day's recorded catalog sits somewhere around 200 songs, and that breadth includeds everything from sloppy covers of ska-core classics to nine-minute rock-opera suites. So why the fuck NOT write a piano ballad? Or a fun, if WAY-late-to-the-party tribute to the Occupy movement ("99 Revolutions")? Or another multi-part punk-rock suite that's a blast to listen to, even though it has absolutely no context ("Dirty Rotten Bastards")? Or another Nimrod-esque mid-tempo pop-punk number with bassist Mike Dirnt inexplicably singing lead for exactly 10 seconds ("Sex, Drugs, and Violence")?