"Careful with That Axe, Eugene" is an instrumental composition by the British rock band Pink Floyd. The studio recording was originally released as the B-side of their single "Point Me at the Sky" and is also featured on the Relics compilation album; live versions can also be found on Ummagumma and in the film Pink Floyd: Live at Pompeii. Pink Floyd re-recorded the track for Italian director Michelangelo Antonioni's film Zabriskie Point, retitling it "Come In Number 51, Your Time Is Up" on the film's soundtrack album. This song was one of several to be considered for the band's "best of" album, Echoes: The Best of Pink Floyd. It was included on the multi-artist Harvest compilation, A Breath of Fresh Air – A Harvest Records Anthology 1969–1974 in 2007.CompositionThe music consists of a light, organ-based jam with Wright utilizing the Phrygian mode and an accompanying bass guitar playing just one tone (in this case, D) in octaves, with a segue into the song's only lyrics: the title of the song whispered menacingly, followed by a Roger Waters scream. The song becomes much louder and more intense before gradually settling down again. In the heavier parts and later, quieter parts, David Gilmour can be heard with guitar and scat vocals; in concert, Gilmour would often sing along with his guitar line.
