to be at least loosely based on traditional song structures, on its mid-career albums the band reverted to an extremely fluid improvisational style. The double album Tago Mago (1971) is often seen as groundbreaking, influential and deeply unconventional, based on intensely rhythmic jazz-inspired drumming, improvised guitar and keyboard soloing (frequently intertwining), tape edits as composition, and Suzuki's idiosyncratic vocalisms. Czukay said it "was an attempt in achieving a mystery musical world from light to darkness and return." In 1971 the band composed the music for the three-part German-language television crime miniseries Das Messer ("The Knife"), directed by Rolf von Sydow. The track "Spoon" was used as the theme song and, released as a single, reached number 6 in the German singles chart. Tago Mago was followed in 1972 by Ege Bamyasi, a more accessible but still avant-garde record which featured "Spoon" and the catchy "Vitamin C". Czukay said, "We could achieve an excellent dry and ambient sound... [Ege Bamyasi] reflects the group being in a lighter mood." It was followed by Future Days in 1973, an early example of ambient music that also includes the pop song "Moonshake". Czukay said, "'Bel Air' [the 20-minute track that takes up all of side two on the original Future Days LP] showed Can in a state of being an electric symphony group performing a peaceful though sometimes dramatic landscape painting." Suzuki left soon after the recording of Future Days to marry his German girlfriend, and become a Jehovah's Witness. Vocals were taken over by Karoli and Schmidt, but after Suzuki's departure, fewer of Can's tracks featured vocals, as the band experimented with the ambient music it had begun with Future Days. Later years: 1974–1979 Soon Over Babaluma from 1974 continued in the ambient style of Future Days, but with some of the abrasive edge of Tago Mago and Ege Bamyasi. In 1975, Can signed with Virgin Records in the UK and EMI/Harvest in Germany, appearing the same year on BBC's Old Grey Whistle Test in a memorable performance of Vernal Equinox in which Schmidt played one keyboard section with a series of rapid karate chops. Shortly after the appearance Schmidt suffered a broken leg which led to cancellation of the band's UK tour. The later albums Landed (1975) and Flow Motion (1976) saw Can moving toward a somewhat more conventional style as its recording technology improved. The disco single "I Want More" from