A joke my friend told me yesterday. A man (lets call him Joe) walks up to his friend (lets call him Jim) working on some kind of plane. ""What'cha got their Joe?"" Joe says. ""Just my new idea for a plane engine."" Jim says. ""Wad'ya mean 'new' idea, Planes Fly good already?"" Joe says, clearly confused. ""Well, I'm making a plane that runs on a very cheap, very plentiful substance. It runs on burning methane and keeps birds away with its gasses."" Jim says with a very triumphant smile on his fa…