Dr. Harold C. Urey, Nobel prize winner in Chemistry, was walking along a sidewalk one
day when he ran into another professor. They chatted for a few minutes, then, as they
parted, Dr. Urey asked the other: "John, which way was I going when I met you?"
"That way," said the other, pointing. "Oh, good. That means I've already
had my lunch," muttered the professor as he walked away.
Bits & Pieces, August,