A duck walks into a bar jumps up on a barstool and ask the bartender "hey bartender you got any corn?" The bartender says "no we don't have any corn!"
A few minutes later the duck asks again "hey bartender you got any corn"? the bartender says "no we don't have any corn!!"
A few minutes later the duck asks again "hey bartender you got any corn?" by now the bartender is pretty fed up and says "no damnit we don't have any corn and if you ask again I'm going to nail your bill to this bar!!" A few minutes later the duck asks "hey bartender you got any nails?" the bartender says "no we don't have any damn nails!!" and the duck says "good,you got any corn?".