A guy walks into a store and asks,
'Hey! Ya got any duck food?' The manager says, 'No, We don't carry duck food.'

The next day the guy goes to the same store and asks,'Hey, Ya got any duck food?'
The manger says, 'No, I told you yesterday, we don't have any duck food.'

The next day the guy goes to the same store and asks,'Hey, Ya got any duck food?'
The manager says, 'Listen! We don't have ANY duck food! And if you come in here agin,
and ask for duck food, I'll nail your feet to the floor!!'

The next day the guy goes to the same store and asks,
'Hey, Ya got any nails?' The manager says, 'No.'
The guy says, 'You got any duck food?'