Suus Mahna is the name given to a Vulcan martial art, one that takes many years of training to learn. Within the art, there is a special move known as the Navorkot which teaches the practioner a way to evade incoming blades. This is done by jumping to the side and rolling based on reading the movement of the enemy and to forsee when, as well as where, they intend to strike. In the alternate timeline created by Nero, Spock was well trained in the art of Suus Mahna, although for defensive purposes only. (TOS novelization: Star Trek)