Ethel May, a little old lady living in a quiet village, answers a knock at her door one day.
She is confronted by a well-dressed young man carrying a vacuum cleaner.
“Good morning, madam,” says the young man. “If I could take a couple of moments of your time, I would love to demonstrate the very latest in high-powered vacuum cleaners.”
“Go away,” Ethel hisses. “I’m broke and I haven’t got any money.”
She attempts to shut the door by the young man wedges his foot in it and pushes it wide open.
“Don’t be too hasty,” he says. “Not until you have at least seen my demonstration.”
With that, he empties a bucket of horse poo all over Ethel’s carpet.
“Now, if this vacuum cleaner does not remove all traces of this poo from your carpet, I will personally eat the remainder.”
Ethel smiles at the man with glee.
“Let me get you a spoon,” she says. “Because they cut off my electricity this morning.”