Fed up with David's childish behavior, Maddie (Cybill Shepherd) bets him that he can't act in a mature manner throughout their next case. David (Bruce Willis) does his best, even though the case at hand--delivering the ransom money for a kidnapped concert pianist--offers ample temptation for him to cut up. By the time the situation is resolved, however, Maddie kind of misses the "old" David and would like to have him back. This is the episode with the infamous (and much-copied) "office limbo" scene.
by Hal Erickson synopsis