You remember the coffee scene in "Back to School"? Rodney Dangerfield is trying to stay awake and study for his oral exams, and is making coffee while half asleep. I may hnot have this totally correct, but here goes:
He puts creamer in the cup, licks his hand, shakes sugar on it, licks the sugar off of his hand, then takes a big "swig" out of the jar of instant coffee, followed by a bug-eyed expression.
Wish I could find a picture, but I cant.