He couldn’t outwit the duck

A duck walked into a bar and said, "Hey bartender, ya got any grapes?" The bartender said, "No, I ain't got no grapes, get outta here." The duck left.

The duck came back the next day and said, "Hey bartender, ya got any grapes?" The bartender said, "No, I ain't got no grapes, and if you ask me one more time if I have any grapes, I'm gonna nail your feet to the floor!" The duck left.

The duck came back the third day and says, "Hey bartender, ya got any nails?" The bartender said, "No, I ain't got no nails.” The duck said, "So ya got any grapes?"