 Gilmour and Shirley also backed Barrett for his one and only live concert during this period . The gig took place on 6 June 1970 at the Olympia Exhibition Hall as part of a Music and Fashion Festival . The trio performed four songs , " Terrapin " , " Gigolo Aunt " , " Effervescing Elephant " and " Octopus " . Poor mixing left the vocals barely audible until part @-@ way through the last number . At the end of the fourth song , Barrett unexpectedly but politely put down his guitar and walked off the stage . The performance has been bootlegged . Barrett made one last appearance on BBC Radio , recording three songs at their studios on 16 February 1971 . All three came from the Barrett album . After this session , he took a hiatus from his music career that lasted more than a year , although in an extensive interview with Mick Rock and Rolling Stone in December , he discussed himself at length , showed off his new 12 @-@ string guitar , talked about touring with Jimi Hendrix and stated that he was frustrated in terms of his musical work because of his inability to find anyone good to play with . 
