High Quality Content by WIKIPEDIA articles! A Momentary Lapse of Reason Tour was a concert tour by the British rock band Pink Floyd from 1987-1989 in support of their album A Momentary Lapse of Reason. The tour ended was the first since The Wall Tour in 1981, also the first without the band’s original bassist Roger Waters. The band reprised the set-list and stage show of this tour for their performance at the Knebworth Festival in 1990.