A good self-defense class can teach you how to size up a situation and decide what you should do. Self-defense classes can also teach special techniques for breaking an attacker's grasp and other things you can do to get away. For example, attackers usually anticipate how their victim might react — that kick to the groin or jab to the eyes, for instance. Self-defense class can teach you ways to surprise your attacker and catch him or her off guard. This creates a buffer space for you to protect yourself and escape the situation with little to no harm..