 wondering if trampolines are not in the end a superior metaphor to lazy rivers. Life's certainly an up-down, up-and-down sort of affair. Although for children, the downs seem to come as a surprise, almost as a delight, being so outrageous, so difficult to believe. Whereas for us, sitting on the wall, clutching our tumblers, it's the ups that have come to appear a little preposterous, hard to credit.