This technique is useful in situations where you have to interact with people who are emotionally important to you and who are trying to manipulate you. The bottom line is this: you need to imagine that your communication partner is simply one of the characters of a performance or a TV program.
A person can talk nastiness, offend you, provoke some actions, and your task is to observe this "game" from outside and evaluate it. For example, a manipulator can play the role of a victim or a powerful person. But you, perceiving his behavior as consciously and critically as possible, know that everything is different - he is not a victim, he does not have much power, etc.
Perception of the "game" from the side will instantly sober you and stabilize the emotional state. With the skillful application of this technique, you can even bring yourself to laughter, and laughter here - the best indicator that you have coped with the task successfully.