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Written by lead guitarist Noel Gallagher, the song, like the album, has a psychedelic feel. It's about Noel's panic attacks which he suffered through depression and substance abuse. It is a fan favourite, but hasn't been played live since 2002. A live version, recorded at Wembley Stadium on July 21 2000, can be found on the Familiar to Millions record. The demo of the track was released as a b-side on the Japanese edition of the 'Who Feels Love?' single.