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Randy Bachman wrote this. He got the idea after hearing the Bob Dylan song "Ballad In Plain D" on the radio. It was a very long song, and just as Bachman was about to turn off the radio, Dylan sang the line "She came undone."
The lyrics are about a girl Bachman saw at a party who went into a coma after dropping acid.
Bachman wrote this after learning some chords from Canadian Jazz guitarist Lenny Breau.
Bachman has said this is his favorite Guess Who song.
This was released as the B-side of "Laughing." It got radio play when some disc jockeys flipped the single and played this instead, which prompted the record company to release it as an A-side 4 months later.
Quentin Tarantino used this in his movie Jackie Brown. It is used in the scene where Bridget Fonda and Robert DeNiro have a fight while this plays in the background.
Bachman was influenced by an obscure Kenny Rankin song called "Soft Guitar." (thanks, Barry Kesten - Bellmore, United States)
Burton Cummings learned to play the flute for this song. In his old band The Deverons he played saxophone. Randy Bachman encouraged him to play the flute for some of their songs, to give them a spacier feel. Right after Randy wrote Undun, The Guess Who played a YAMAHA music store opening where they had a flute in the display case. Burton learned from the dealer that the fingering for the flute was the same as a sax (except for C), and a classic was born. (thanks, Richard - Lansing, MI)
Richard explains how Joe Walsh kickstarted his career, and why he chose Hazard, Nebraska for a hit.
The Scorpions and UFO guitarist is also a very prolific songwriter. He explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.