Nelson Mandela is sitting at home watching TV and drinking a beer when he hears a knock at the door. When he opens it, he is confronted by a little Chinese man, clutching a clip board and yelling, 'You Sign! You sign!' Behind him is an enormous truck full of car exhaust pipes. Nelson is standing there in complete amazement, when the Chinese man starts to yell louder. 'You Sign! You sign!' Nelson says to him, 'Look, you've obviously got the wrong man',and shuts the door in his face. The next day …