How to play an insane person. 17F disability 2. Even if an actor is playing a neurotic person one stays with the overall acting principle for emotions for a character, which is, one emotion for each character until new information or new event occurs to change it .
Life requires order and with insanity make changes with emotion.
Don't be predictive, because mad is totally unpredictable, always surprise audience. Principle of playing insane . Actor is an entertainer. Two emotions that have nothing to do with each other. Connected to nothing.