Duck walks into a bar:
Duck: have you got any bread?
Barman: no
Duck: have you got any bread?
Barman: no
Duck: have you got any bread?
Barman: no, and if you ask me again, I’ll nail your bill to the
floor.
The duck is quiet for a couple of minutes and then asks:
Have you got any nails?
Barman: no
Duck: have you got any bread?