(Best told by someone with a New Yawk accent)
A duck walks into a convenience store and says, "got any grapes?"
The clerk says, "No sir, this is a convenience store, we don't sell any produce."
The duck waddles out.
The next day, the duck walks back into the store and says, "got any grapes?"
The clerk says, "Look, you were just in here yesterday asking the same thing. We don't got no grapes!!"
The duck waddles out.
The third day, the duck walks in, and says "got any grapes?"
The clerk blows his lid. "I've told you for last *******ed time we don't got no freakin grapes! If you walk in here again and ask the same thing, I'm going to take some nails and nail your stupid webbed feet to the floor!!!!"
So the duck waddles out.
The next day, the duck walks in and says, "got any nails?"