Arnaldo Baptista of Os Mutantes is telling me why South American music can be so compelling: "It's the historical mix, Incas, black Africans, Europeans, beings from Outer Space." I beg his pardon. "Oh, yes, I have seen many flying saucers". Arnaldo is being perfectly serious and launches into his theory of Time (he has formulas and diagrams) which state that once humans go faster than the speed of light, we will be able to travel back to the past. He thinks will freeze himself cryogenically and be unfrozen when this is possible, travelling in the future to go to the past. He has theories about the Age of Fire (we are, he says, about to leave it). Then he goes into a rambling but detailed and convincing comparison of the psychic effects of Gibson and Fender guitar sounds.