A little old woman answered a knock on the door one day, only to be confronted by a well-dressed young man carrying a vacuum cleaner."Good morning," said the young man. "If I could take a couple of minutes of your time, I would like to demonstrate the very latest in high-powered vacuum cleaners. "Go away!" said the old woman. "I haven't got any money!" and she proceeded to close the door. Quick as a flash, the young man wedged his foot in the door and pushed it wide open. Read next feature >