I found this joke on The Ironic Catholic. Enjoy!
Recently, while allegedly going through an airport during one of his many trips, President Bush encountered a man with long gray hair and beard, wearing a white robe and sandals, holding a staff. President Bush went up to the man and said, ‘Has anyone told you that you look like Moses?’
The man didn’t answer. He just kept staring straight ahead. The president said, ‘Moses!’ in a loud voice. The man just stared ahead, never acknowledging the president.
The president pulled a Secret Service agent aside and, pointing to the robed man, asked, ‘Am I crazy or does that man not look like Moses to you? The Secret Service agent looked at the man and agreed.
‘Well,’ said the president, ‘every time I say his name, he ignores me and stares straight ahead, refusing to speak. Watch!’ Again the president yelled, ‘Moses!’ and again the man ignored him.
The Secret Service agent went up to the man in the white robe and whispered, ‘You look just like Moses. Are you Moses?’
The man leaned over and whispered back, ‘Shhhh! Yes, I am Moses. But the last time I talked to a bush, I spent 40 years wandering in the desert and ended up leading my people to the only spot in the entire Middle East with no oil.’