Rene Descartes walks up to the window at a fast food drive-in restaurant and orders a hamburger. The kid in the paper hat asks, "Do you want fries with that?" Descartes says, "I think not." And vanishes!

(Rimshot!)

The Dalai Lama walks up to the window at a fast food drive-in restaurant and orders a hamburger. He hands the kid in the paper hat a five dollar bill. The kid hands him the hamburger. The Dalia Lama says, "Where's my change?" The kid in the paper hat says, "Change comes from within."

(Another rimshot!)

Don Firth