Removing anxiety through a detailed description of one’s behavior is one of the options for desensitization.
If there is no time to relieve fear through relaxation, describe in detail the terrible situation and your behavior in it. It is important that you have a good idea of it: who will stand where, who will say what, what you will do, and so on. The effectiveness of this method is less than the removal of fears through relaxation — but it is also quite working.
Why? Because when you describe a terrible situation in detail, your attention is occupied with intellectual activity and the body is calm. As long as your body is calm, your story over and over again destroys your fears.