"Another Brick in the Wall" is a three-part composition on Pink Floyd's 1979 rock opera The Wall, written by bassist Roger Waters. "Part 2", a protest song against corporal punishment, and rigid and abusive schooling, features a children's choir. At the suggestion of producer Bob Ezrin, Pink Floyd added elements of disco. "Part 2" was released as a single, Pink Floyd's first in the UK since "Point Me at the Sky" (1968). It sold over four million copies worldwide and topped singles charts in fourteen countries, including in the UK and United States. It was nominated for a Grammy Award and was ranked number 384 on Rolling Stones list of "The 500 Greatest Songs of All Time". Concept The three parts of "Another Brick in the Wall" appear on Pink Floyd's 1979 rock opera album The Wall. They are essentially one verse each, although Part 2 sees its own verse sung twice: once by Floyd members, and the second time by the guest choir along with Waters and Gilmour. During "Part 1", the protagonist, Pink, begins building a metaphorical wall around himself following the death of his father. In "Part 2", traumas involving his overprotective mother and abusive schoolteachers become bricks in the wall. Following a violent breakdown in "Part 3", Pink dismisses everyone he knows as "just bricks in the wall." Bassist Roger Waters wrote "Part 2" as a protest against rigid schooling, particularly boarding schools. "Another Brick in the Wall" appears in the film based on the album. In the "Part 2" sequence, children enter a school and march in unison through a meat grinder, becoming "putty-faced" clones, before rioting and burning down the school. Recording At the suggestion of producer Bob Ezrin, Pink Floyd added elements of disco, which was popular at the time. According to guitarist David Gilmour: Gilmour recorded his guitar solo using a 1955 Gibson Les Paul Gold Top guitar with P-90 pick-ups. Despite his reservations about Ezrin's additions, Gilmour felt the final song still sounded like Pink Floyd. When Ezrin heard the song with a disco beat, he was convinced it could become a hit, but felt it needed to be longer, with two verses and two choruses. The band resisted, saying they did not release singles; Waters told him: "Go ahead and waste your time doing silly stuff." While the band members were away, Ezrin edited the takes into an extended version.