"Bike" is the final track featured on their 1967 debut album, The Piper at the Gates of Dawn. In the song, Syd Barrett's lyrical subject shows a girl his bike (which he borrowed); a cloak; a homeless, aging mouse that he calls Gerald; and a clan of gingerbread men, because she "fits in with [his] world." With each repetition of the chorus, a sudden percussive noise is heard similar to the firing of two gunshots. Towards the end of the song, he offers to take her into a "room of musical tunes". The final verse is followed by an instrumental section that is a piece of musique concrète: a noisy collage of oscillators, clocks, gongs, bells, a violin, and other sounds edited with tape techniques, apparently the "other room" spoken of in the song and giving the impression of the turning gears of a bicycle. The ending of the song fades out with a tape loop of the band members laughing reversed and played at double speed. The song was written for Barrett's then girlfriend, Jenny Spires.