A Duck walks into a bar. 

Duck: You got any bread?
Barman: No, sorry, we don't have any bread
[After a few minutes]
Duck: You got any bread?
Barman: Look, we don't have any bread
[In a little while]
Duck: You got any bread?
Barman: We don't have any F*****g bread!
[Some time later]
Duck: Got any bread?
Barman: If you ask me if I've got any 
F*****g bread once more I'm gonna nail 
your F*****g bill to this bar.
.....
............
Duck: You got any nails?
Barman: NO!
Duck: You got any bread?  

Sent by Duncan