“Don’t Sit Down” is a squib, a 40-second lazy jam with a Bowie guide vocal that soon cracks up. Its presence on Space Oddity is part of the deliberate informality of late ’60s LPs, from Jimi Hendrix coughing at the start of “Rainy Day, Dream Away” to Dylan murmuring “Is [the tape] rolling, Bob?” on Nashville Skyline to the king of them all, the Beatles’ White Album, which is riddled with mutters, coughs, false starts, control room chat, outtakes (the fiddle scrapings at the end of “Don’t Pass Me By,” etc.) and tiny shards of discarded tracks. Something that would get an engineer or producer reprimanded in 1963 was now proof that a band was keeping it real.
RCA deleted “Don’t Sit Down” when it reissued the Space Oddity LP in 1972 and the track finally was restored on the Rykodisc 1990 CD release. No one had missed it.