The classic DUCK joke, improved!

One day, a duck walked into a store and asked for grapes. "Sorry," said the store keeper, "We don't have any grapes." Then the duck went home. The next day, the duck came back and asked for grapes. "I told you," the store keeper said, "We have no grapes!" The duck, once again, went home. The next day, the duck came back and asked for grapes. "I told you!" The store keeper said impatiently, "WE HAVE NO GRAPES! If you come and ask that again, I'll NAIL your bill to the floor!" The duck hurried home. The next day, the duck went back to the store and asked, "Do you have any nails?" The storekeeper replied, "No, we don't." "Oh, okay," the duck said, "Do you have any grapes?"
Originally published November 14, 2002.