Identify and explain an example of a humorous misunderstanding or slapstick comedy in The Taming of the Shrew.

In Shakespeare's The Taming of the
Shrew, we see humorous misunderstanding and slapstick in Act II, scene
i.

Petruchio has been encouraged to woo and wed Katharina,
the shrew in the story. He is drawn by her fine dowry. Petruchio meets with the girl's
father, Baptista, and they settle upon the financial details of the marriage. Petruchio
is interested in beginning his courtship immediately, and we have learned he intends to
flatter her into a good humor.

Katharina and Petruchio
meet, and thus begins the battle. I have seen this play staged, and the slapstick comedy
is present as Petruchio makes advances toward Katharina, and she physically side-steps
his attempts, turning his words back on him by twisting their meaning, while also
throwing things at him. A great deal of the slapstick humor would depend on the physical
"blocking" of the players.

In this part of the play, there
is also a moment when Katharina slaps Petruchio and he warns her not to do so again.
Their battle then continues with the thrust-and-parry of barbed
comments.

When Petruchio suggests that Katharina sit on his
lap, she says:

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Asses are made to bear, and so are
you...

...inferring that he
is not only an ass that one might sit upon, but he is, as a man, an
ass.

Later in this scene, the "misunderstandings" are
purposeful as well:

Petruchio: Nay, come, Kate, come; you must not
look so sour.
Kate: It is my fashion, when I see a crab.Petruchio: Why, here's
no crab; and therefore look not sour.Kate: There is, there is.Petruchio: Then show it
me.Kate: Had I a glass, I would.Petruchio: What, you mean my face?      
(233-239)
When Petruchio accuses Kate of having a sour look on her face, she
responds it is her way when she sees a "crab," but he insists there is no crab.
She insists there is, and he asks her to show
him.  She tells him that if she had a mirror ("glass") she would, by showing him his own
reflection.
The comedy comes from Kate's desire to be ornery and
argumentative with Petruchio, giving him no opportunity to gain ground with her; she
does this by using double entendres, taking his words to means the opposite of what his
intent is. He is no better, delivering his own double entendres, but she is a equally
matched with him it would seem.
Shakespeare was a master at using verbal and
physical humor at the same time in order to entertain his audiences.