B-sides
Unlike most singles, "Zero" was released as an EP and included "Pastichio Medley", a medley of parts of songs from the Mellon Collie sessions that mostly remain unreleased. The medley runs over 23 minutes and features over 70 songs. The medley also features snippets of songs that actually were released; the snippet of the song "Disconnected" is a riff from an early version of "The Aeroplane Flies High (Turns Left, Looks Right)" and the riff called "Rachel" ended up being worked into the album track "X.Y.U."
The track "Tribute to Johnny" is an instrumental; a homage to guitarist Johnny Winter. Not long after the release of the EP, Smashing Pumpkins touring keyboardist Jonathan Melvoin died of a heroin overdose, leading many uninformed fans to assume this song was a tribute to Melvoin.
Additionally, the title of the song "Marquis in Spades" is a reference to the French aristocrat and novelist, Marquis de Sade.
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