It's a salesman. "Hello, I'm selling this new version vacuum cleaner. It cleans not only dust, it cleans cobwebs, too. And the handy-dandy attachment can be used for windows or carpets, by the simple twist of a handy-dandy knob!"
"Listen, I have no time for vacuum cleaners right now. Next, you'll be telling me that the thing can dance to my tune."
The salesman's face takes on a look of utter surprise. The vacuum cleaner he is holding - handy-dandy attachment and all, is moving. Jerkily. Three jerks left, two jerks right. One jerk forward, two jerks back. One more time. Three jerks left, two jerks right. One jerk forward, two jerks back. Once again, now Three jerks left, two jerks ...
Tommy's sister comes to the door to ask him to do something about her. "Paaants - again, Paaaaants - again aiooooooo," she goes, and the vacuum cleaner, with its handy-dandy attachment, jerks in time.
"Oh, great," Tommy says. "I have a handy-dandy vacuum cleaner dancing to the tune of my broken record sister. All I need now is ..."