Actually IrisMoon there is a lets use expression "spell" that does what he wants but there is nothing magical about it. It`s just a form of combat meditation that uses psychology and our natural instincts to make you look more intimidating then you really are, and I more or less mentioned it in my first post on this discussion just not in detail(experiencing of those emotions I mentioned must come from another human, so you could to a point mimic there posture, breathing, movements and eventually develop your own). Research in empathy and its counter part(has nothing magical in it, he basically needs to study them as a part of human psychology) is to help develop previously mentioned.
But yeah I agree that for self defense it would be best for him to simply study a martial art or seven(in my case, although only 2 are serious, others are to feel in the holes).
I got my scare from my Ninjutsu sensei, I swear it felt like his going to rip me to shreds(like I was standing in front of a predator of some sort or an angry alpha depending how you want to describe it both are accurate), lucky me it was only for a demo.