A rabbit came into a shop and asked, "Got any carrots?" The seller answered, "No!"
The next day the rabbit came again and asked, "Got any carrots?" The seller replied "No!"
Next day the rabbit came and asked, "Got any carrots?" The seller shouted, "No! And if you come again and ask for carrots, I'll take nails and hammer you on the wall by your ears!"
Early next morning the rabbit came back and asked, " Got any nails?" The seller answered, "No!" The rabbit asked, "Got any carrots?"