Coldplay's second album, A Rush of Blood to the Head, was nearing completion when an excited Chris Martin arrived at the studio late one night. At the keyboard, he played the tune running through his head. Lead guitarist Jonny Buckland was impressed. "He picked up his guitar [a sure sign that he likes a song] and played these brilliant chords," Martin recalls. "It was like a chemical reaction process."
The pulsing, cyclical riff – inspired, according to Martin, by the band Muse – was edgy, hectic and suggested an uneasy passage of time. The band all agreed: this was the sound to herald the next phase in Coldplay's musical development.
But, for now, they had enough songs on the second album and, under pressure to get them out and running low on studio time, they quickly cut a demo of the new composition and filed it under "Songs for #3" – ideas for a projected third album.
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