DO YOU HAVE ANY GRAPES

One day a frog hops into a bar, jumps up on the stool, and asks the bartender if he has any grapes. The bartender says no, so the frog hops away. The next day, the frog hops into the bar and asks the bartender if he has any grapes. The bartender says no, so the frog hops away. The next day, the frog hops into the bar and asks the bartender if he has any grapes. The bartender say, "No, I don't have any grapes, and the next time you ask, I'll nail you to the wall." So the frog hops away. The next day, the frog hops in and asks the bartender, "Do you have any nails?" the bartender says no, so then the frogs says, "Well in that case, do you have any grapes?"