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A door-to-door vacuum salesman

A door-to-door vacuum salesman knocks, and an old lady opens the door, and before she has a chance to say anything, he runs inside and empties a bucket of horse poop over her hall carpet.
He says, "Lady, if this vacuum cleaner don't clean up every last speck of that, I'll eat it."
"Do you want a spoon?" she asks, "We've only moved in this morning and the electricity's not on yet."