While they're engaged in any activity they are both having and not having fun playing the game. Not until the random rewards are given do they actually know which was the real case.
EDIT: Kage Goomba, your idea of not opening the box is a good one. How about calling the error message when a person gets kicked to orbit [b]just befor[/b]e finishing an activity -- "Schrödinger's Cat"?
-
You are talking way over most people's head on the forums. Most will think you are talking about the piano playing kid from the peanuts movie. They are thinking "I didn't even know he had a cat".