Have a partner place their fist on your neck and press. Feel the tension from your body resisting the movement and allow the leg which is in the direction or closest to the continouation of the press to negate the movement and no more. Have your feet rest under your hips and your hips above your feet so when the neck is under pressure your entire body spreads the pressure and moves to avoid injury and no more. Do this with eyes closed and from all directions without aggressiveness. This way you have the chance to clean out the flinch and the fear control over you and you can use them as tools rather than them wielding you. Continue to spread the fists over the entire body and also have your partner squat close to you and press the legs and hips with his fists. It is a good way to relax and to move naturally. Once you covered the entire body move to the head and here allow the fist to align with the contact without becoming uncomfortable as the pusher and as the person being pushed remember the eyes are very soft and avoid sticking someone else thumbs there.
Breath without stop during the drill paying attention to let the breath stay within bounds of comfort as well. Avoid pulling too much air inside and becoming stiff and avoid breathing to shallow and becoming less dense.
Both should have their eyes free from focusing solely on the partner. The worlds is big and there are a lot of people with tire irons…