Apparently,

this really happened a while ago... ;-)

George W. Bush was getting off of Airforce One in Israel, when he walked passed Moses, who didn't seem to notice him. He turned to Moses and said, "I am George W. Bush, the President of the USA, the most powerful nation on earth. Why didn't you greet me?"

Moses replied, "The last time I spoke to a bush, we starved for 40 years!"