This one is very old but I think funny.
George Washington, Abraham Lincoln, and George Bush are in a plane.
The pilot says that the passengers must lighten their load. so the three presidents decide to drop one item
George Washington drops a quarter
Abe Lincoln drops a penny
George Bush drops a grenade
When the presidents land, they find someone holding their head and cursing.
George Washington asks the man what's wrong.
"i was walking down the street when a quarter falls from the sky and hits my head!"
So the presidents continue down the road and find someone hopping on one foot, holding the other, cursing. Abe Lincoln asks "What happened?"
"i was standing on my porch barefoot when a penny falls from the sky and hits it!"
The presidents continue once more and find a young boy laughing hysterically.
George Bush asks "What's so funny?"
The boy replies "I farted and my house exploded!!!"