So, this cat is walking down the street. It's like, on the Deep South Side of Chicago and he's white and he's really, really, worried. All he wants to do is catch a bus and go home.

Walks up to a bus stop where there's the big black guy already waiting. White guy's really worried, 'cause this other guy could crumble him up like a piece of paper. He waits for a few minutes and then asks the other guy, "Cross town buses run all night?"

And the guy replies, "Doo dah, doo dah." And they both went back to the black guys place for some more of what was being smoked.