I barely know the Mars Volta's songs (although from this it seems like I would if I heard them), but I was struck by a lot of the things Omar Rodriguez Lopez says in this interview in The Onion's a.v. club section. Particularly the parts about being in a certain state of mind when you create something: "It's what it's like when you're a drug addict. You have these crazy realities happening in your head, where once you sober up and become a different person, you look back and go, 'What the fuck was I thinking?'" Which made me think about something Heath Ledger said: “I feel like nearly everyone knows how to play a junkie by now."