This is a photo taken by a bartender after he bought a beer for the duck that outsmarted him...
A duck walks into a bar and asks the bartender, "Got any grapes?" Bartender says, "No, and even if we did I wouldn't give you any. We don't serve ducks here, get lost."
Next day, the duck comes back. "Got any grapes?" Bartender says, "No, still no grapes, and we still don't serve ducks. If you ever come back in here, I'm going to nail your bill to the bar."
A day later, the duck comes back. "Got any nails?"
Duck: "Got any grapes?"