"Chinese Surprise"

A couple goes for a meal at a Chinese restaurant
and orders the Chicken Surprise. The waiter brings
the meal, served in a lidded cast iron pot. Just as the
wife is about to serve herself, the lid of the pot rises
lightly and she briefly sees two beady little eyes looking
around before the lid slams back down.

"Good grief, did you see that?" she asks her husband.

He hasn't, so she asks him to look in the pot. He reaches
for it and again, the lid rises and he sees two little eyes
looking around before it slams down.

Rather perturbed, he calls the waiter over, explains what
is happening and demands an explanation.

"Please sir," says the waiter, "what you order?"

"Chicken Surprise."

"Ah, so sorry. I bring you Peeking Duck."