Five milliseconds after beginning to chew a mouthful of food,
the waiter will arrive and ask if it tastes OK. He will be unable to
interpret hasty nods of the head, thumbs-up gestures, or words from your
spouse, and will wait, staring at you like a stunned ox, until you have
chewed, swallowed, and allayed his fears yourself: "yes."
We tipped him anyway.
-- A new corollary to Murphy's law
-- (experimentally verified this past weekend
-- at the Olive Garden restaurant in Spokane, Washington)