The Persistant Salesman
A little old lady answered a knock at her door one day, only to be confronted with a well-dressed young man carrying a vacuum cleaner.
God morning, said the young man. If I could take a few minutes of your time, I would like to demonstrate the very latest in high-powered vacuum cleaners.
Go away said the little old lady, I don't have any money. She proceeded to close the door.
Quick as a flash the salesman wedged his foot in the door and pushed it wide open. Don't be to hasty he said not until at least you have my demonstration. And with that he emptied a bucket of horse manure onto her hallway carpet. If this vacuum cleaner. Doesn't remove all traces of this horse manure from your carpet I will personally eat the remainder.
The little old lady stepped back and said, well I hope you got a darned good appetite, because they cut my electricity off this morning.