Have a partner walk around and through you. You work on staying free from focusing on him with your eyes and add a hand or two moving on your body or to your head in a way which is not speedy or aggresive. In this way you learn to move so you can more easily survive without increasing the intensity of the conflict. For example you can dust off your sleeve, adjust your glasses or streatch. Avoid lifting a hand and forgeting about it. Keep moving and have purpose in your movement. It is easier to be alive than to come back to life.
Let your fear help but avoid letting it control you.