"Big Bang Baby" - most of the lyrics point to it being about Courtney and Kurt; some pretty overtly ("a wedding and a shell"), some more subtly ("where the birds can't sing along" - the animatronic birds in Nirvana's "Heart-Shaped Box" video)

Yeah, seemed like a bit of a parting shot. We all knew his issues. "It made you who you were." (a F-up who constantly scuttled our band - who's laughing now - sort of thing)