Take a partner and work with him either with your body or adding tools on surprise attacks from all sides with this in mind. Take a seated position and have your partner walk around. He will attack or hit you with something whenever he wants and you need to stay aware and survive and use what you have to keep moving (for example use the chair against the hands holding the knife or the bench as a tripping point to fell him and run away) Change places and explore. Do the same for different ways of sitting and standing, leaning against a wall or holding a newspaper and note to yourself to keep some of your awareness outside even when you are fully engaged in a job and to avoid disregarding the feeling of social discomfort. If you don’t like someone near you say so or get out of where you are. Defending a place is also important sometimes but that is another matter and still movement even in place (body guard, father, husband, yes I am a bit of a shovanist ) is key to staying alive and completing the job in this order.
And relax the face.