An old woman went to a supermarket, to the tomato or tofu stall. She bent down to pick some tomatoes or tofu, and because she was old, her spine gave her trouble and she felt a sharp pain. So she just shrieked, "Ah....", the way you do when you see a mouse in the kitchen. And the seller at the counter said, "Wow, if you think the tomatoes are expensive, you should see the price of the zucchini（绿皮西葫芦）."