Three men - an Australian farmer, Osama bin Laden and a  Biker are all walking together one day.  
 They come across a lantern and a Genie pops out of it.  
 'I will give each of you one wish, which is three wishes in total',   
 says the Genie.  

 The Australian says, 'I am a farmer and my son will also farm.  I want the land to be forever fertile in  Australia   '  
 POOF! With the blink of the Genie's eye, the land in  Australia  was forever fertile for farming.  
 Osama was amazed, so he said, 'I want a wall around Afghanistan ,   Palestine ,  Iraq and Iran  so that no infidels, Americans or Australians  can come into our precious land.'  
 POOF! Again, with the blink of the Genie's eye, there was a huge wall around those countries.  
 The Biker says,'I am very curious.   Please tell me more about this wall.'  
 The Genie explains, 'Well, it's about 5,000 feet  high, 5oo feet thick and completely surrounds the countries. Nothing can get in or out;   it's virtually impenetrable.'  
 The Biker sits down on his Harley, lites a joint, smiles and says,  
  'Fill it with water.'