After doing the arm restraint on a guy who decided to pull a knife on me, I decided to put thumb on the point behind the jaw, and fingers along the underside of his jaw, push, and grip hard.
He quit struggling, and he quit bothering me after that.
Never did get formal training in anything.
Yes, drat, but I can run and buy a rent-a-cop badge so I can still arrest you for your hauntings.
No one dared bother me in school, not even the pervert teachers and priests. Whenever I stood up, they ran away.