If you have some time available and are intrigued to learn self-preservation, taking a couple of exercises in Brazilian Jiu-Jitsu or BJJ may very well be the thing to attempt. It is military craftsmanship known to be delicate, concentrating on the expertise of controlling one's rival with beginnings in Judo and Japanese Jujutsu. Its prevalence has been on the ascent and learning this craftsmanship in Brazil would be an unpredictable yet compensating experience.