A stranger was seated next to a Jamaican on Air Jamaica when the stranger turned to the Jamaican and said, "Let's talk. I've heard that flights will go quicker if you strike up a conversation with your fellow passenger." 

The Jamaican, who had just turned on some reggae on his walkman, turned it down, and said to the stranger, "Wha yu like fe discuss, Sah?" 

"Oh, I don't know," said the stranger thinking that he would stump the Jamaican, he said, "Nuclear power?"

"Aaaright," said the Jamaican. "dat could be one in-tresting topic. But mek me ask yu one question fus" . 

"Go ahead, said the stranger". 

"A donkey, a cow an deer all eat grass, rite? Yet a deer excretes little pellets, while a cow tun out flat patties, an donkey produces clumps of dried grass. Why do you suppose that is?" 

"Jeez," said the stranger. "I have no idea." 

"Well, den," said the Jamaican, "How in de world is it dat yu feel qualified fe discuss nuclear power wen yu don't even know crap?