CARL PALMER: of the progressive rock group EMERSON, LAKE & PALMER plays his all-steel synthesized concert tom toms, tympani, tubular bells and gongs, all set on a revolving Japanese pagoda and decorated with elaborate engravings. 'Christo's Canyon Curtain': a film of JUAN CHRISTO'S latest exploit - to throw a massive orange curtain across a mile-wide valley in Colorado, USA.