An Indian and a Sri Lankan are sitting next to each other on a long flight in Heathrow Airport. The Indian is thinking that Sri Lankans are so dumb that he could get over on them easy...So the Indian asks if the Sri Lankan would like to play a fun game.

The Sri Lankan is tired and just wants to take a nap so he politely declines and tries to catch a few winks. The Indian persists, and says that the game is a lot of fun. I ask you a question, and if you don't know the answer, you pay me only $5; you ask me one, and if I don't know the answer, I will pay you $500, he says. This catches the Sri Lankan's attention and to keep the Indian quiet, he agrees to play the game.

The Indian asks the first question. 'What's the distance from The Earth to the Moon?' The Sri Lankan doesn't say a word, reaches in his pocket pulls out a five-dollar bill and hands it to the lawyer.

Now, it's the Sri Lankan's turn. He asks the Indian,' what goes up a hill with three legs, and comes down with four?'

The Indian uses his laptop and searches all references he could find on the Net. He sends e-mails to all the smart friends he knows, all to no avail. After one hour of searching he finally gives up. He wakes up the Sri Lankan and hands him $500.

The Sri Lankan pockets the $500 and goes right back to sleep. The Indian is going nuts not knowing the answer. He wakes the Sri Lankan up and asks, 'Well, so what goes up a hill with three legs and comes down with four?'

The Sri Lankan reaches in his pocket, hands the Indian $5 and goes back to sleep.

Moral of the story - Don't mess with Sri Lankans.