A little old lady answered her door only to be confronted by a young vacuum cleaner salesman. "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 lady. "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. "Don't be too hasty," he said, "not until you've seen my demonstration." With that he emptied a bucket of dirt onto her hallway carpet. "If this vacuum cleaner doesn't remove all traces of this dirt from your carpet, Madam, I will personally eat the remainder." "Well," she said, "I hope you're hungry, because the electricity was cut off this morning." | 
