A little old lady 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 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 and
pushed wide open.

"Don't be too hasty!" he said.  "Not until you have at least seen my
demonstration." And with that, he emptied a bucket of horse manure
onto her hallway carpet.

"If this vacuum cleaner does not remove all traces of this horse
manure from your carpet, Madam, I will personally eat the remainder."

The old lady stepped back and said, "Well I hope you've got a
damned good appetite, because they cut off my electricity this  morning."