There are umpteen zillion versions of this skit. The one that I know goes like this.
Hi, my name is Joe,
And I work in a Button Factory.
I've got a wife, three kids,
And that's a lot.
One day my boss said to me,
Joe, are you busy?
I said no. He said,
Then press this button with your right hand.
Repeat the chant, pressing buttons with the left hand, right foot, left foot, knees, head, tongue, etc, until finally, when the kid is gyrating wildly to the chant, and the boss asks, "are you busy" he says YES! and walks off.