Imagine being in a play where your character is dissatisfied with his/her life, experiences fear, anger, jealousy, anxiety, impatience, sadness and more. She reacts and behaves unskillfully. As long as the actor realizes that it is an act, no problem; there is entertainment.
But if the actor takes on the persona of the character and suffers and behaves as if the play was real, that is a problem.
