Using the Human Body in Self Defense Techniques

A lot of people do these, you know, self defense or maybe they're like doing mixed martial arts. But it seems like a lot of them try to work with moving with the body and using their momentum in defending yourself. And that's a lot of practical to me because again if someone's bigger than you are stronger than they just grab you. It seems like it's going to be hard to get out of that. I tell people all the time the worst way to ever evaluate whether a system is going to be useful to you is to view training videos of the system Because it's always going to look good.