I think this is an important point (and something I've harped on in other threads on self-defense). How someone psychologically reacts or interprets what is happening will dictate to a large degree their physical abilities. Which is something I am trying to get over myself - I am more of a self-doubter. I think if I doubted less, I could just let my body react and do its thing.I'd modify "strength" to reflect psychological as well as physical strength.