Floyd + Apollo = Awesomeness
From Wikipedia: "Moonhead", sometimes known as "Trip on Mars", is an unreleased song played by the BBC in between broadcast coverage of the Apollo moon landing on 20 July 1969. The BBC called this programme "But what if it's made of green cheese?" The song was written in 1969 for this specific purpose and has never been officially released, although it can be found on various bootleg recordings. It found its way into the band's live set on rare occasion, such as Birmingham Town Hall, 11 Feb 1970 and Gothenburg Sweden, 11 Nov 1970 (the latter performance is often labeled as "Corrosion"). Sometimes seen as a predecessor to one section of the song "Money".