Too much wood isn’t good, a Chinese truck driver learned. He was loading his medium-sized JAC truck with used wood on an industrial estate near the great city of Dongguan in Guangzhou Province. The truck flipped backwards and ended up neatly on its rear wheels, the cabin happy-high in the sky. Fortunately nobody got hurt but the driver needs to do some careful calculations, about the weight of certain kinds of wood and such, to make sure his fine blue vehicle returns to earth without braking the front axle, or worse.