The new salesman had just completed his training and was anxious to put his skills to work. He took his Hoover vacuum cleaner to the front door of a house and rang the bell. A rather unpleasant woman answered. Before she could say anything he threw a pile of cow patties in the door behind her onto the rug. "Lady," he said, "If this vacuum cleaner doesn't clean up all those cow patties, I'll eat them myself."

"I'll get you a spoon," scowled the lady. "Our electricity hasn't been turned on, yet."