Can's live shows often melded spontaneous improvisation of this kind with songs appearing on their albums. The track "Colchester Finale", appearing on the "Can Live" album, incorporates portions of "Halleluhwah" into a composition lasting over half an hour. Early concerts found Mooney and Suzuki often able to shock audiences. The actor David Niven was asked by Czukay what he had thought of a concert, Niven replied: "It was great, but I didn't know it was music." After the departure of Suzuki, the music grew in intensity without a vocal centre. The band maintained their ability to collectively improvise with or without central themes for hours at a time (their longest performance, in Berlin, lasted over six hours), resulting in a large archive of performances.