A rabbit walks into a corner shop and thumps the counter several times.
THUMP! THUMP! THUMP!
An irate shopkeeper emerges.
"A half a pound of carrots, please." says the rabbit.
The shopkeeper fetches the carrots but asks the rabbit not to thump the counter as it's annoying. The rabbit apologises profusely.
The next day, the rabbit goes back into the shop.
THUMP! THUMP! THUMP! " half a pound of carrots please."
The shopkeeper glares at him. "Fine, I'll serve you the carrots but I've asked you before not to bang the counter like that. It's really annoying!" Again the rabbit apologises profusely.
Day three and the rabbit returns to the shop.
THUMP!THUMP!THUMP!
The shopkeeper is at the end of his tether at this point and grabs the rabbit by the throat. "Look, I've told you before NOT TO BANG THE COUNTER!!! The next time you do that I'm going to nail your paws to the counter with six inch nails!"
Day four, the rabbit walks meekly into the shop and asks for a bag of six inch nails. The shop keeper looks confused.
"We haven't got any six inch nails,"......

THUMP! THUMP! THUMP! "A half a pound of carrots please..."