Toop, 1968: "The only memorable performance [at a London psychedelic club] comes from artist John Latham. He is hunched over a large, floor-standing electric saw, the kind you see used by timber merchants. This is connected by contact microphones to an amplifier and he is passing books through the saw blade, slicing them into chunks. A monstrous, chaotic, exhilarating drone batters the air"