True street self defense techniques are very basic. Palm strike, knees and elbows. If you take a self defense class and they teach you 100 different ways to get out of a wrist grab then you are wasting your time because you will never remember it. A good self defense class teaches how not to be a victim by the way you look and act. A stranger, or bully for the kids, is looking for the weak person who will not put up a fight. If you taech self defense classes then you need to incorporate adrenal response and verbal boundaries. And yes it can be taught in a 3 hour seminar, trust me.