A duck walks into a bar. He goes up to the bartender and says "Got any
grapes?" The bartender says "No" so the duck leaves. The duck comes back the
next day, goes up to the bartender, and says "Got any grapes?" The bartender
says "No" so the duck leaves. The next day the duck comes back again. He goes
up to the bartender and says "Got any grapes?" The bartender says "Look duck.
We don't have any grapes today, we didn't have any yesterday, and we
definitely won't have any tomorrow. If you come back in here and ask for
grapes again, I'm going to nail your webbed feet to the floor." So the duck
leaves. The duck comes back the next day, goes up to the bartender and asks
"Got any nails?" The bartender says "No." Then the duck says "Oh good. Got
any grapes?"