The Tunnel...

Via my mom:

Sitting together on a train was Obama, George Bush Jr., a little old lady, and a young blonde girl with large breasts..

The train goes into a dark tunnel and a few seconds later there is the sound of a loud slap.

When the train emerges from the tunnel, Obama has a bright red hand print on his cheek.

No one speaks.

The old lady thinks:
Obama must have groped the blonde in the dark, and she slapped him.

The blonde girl thinks:
Obama must have tried to grope me in the dark, but missed and fondled the old lady and she slapped him.

Obama thinks:
Bush must have groped the blonde in the dark. She tried to slap him but missed and got me instead.

George Bush thinks:
I can't wait for another tunnel, so I can smack Obama again.