I have no martial art experience beyond one of those introductory tae kwan do classes when Karate Kid was popular. Geezus I feel old. But while I didn't like sparring because... yeah, I admit it, I'mma softie girl and didn't like hurting the opponent... I've grown up quite a bit since then and have had to face down guys who could have done serious harm if they didn't buy into my red-head temper - which was pure raging bluff. Thankfully, they were just bullies, and those jerks really don't have a backbone. I've not been back to modern martial arts classes because they are for show and competition, which I've seen more than one video show is very ineffective in the real world.
But this... This I would be very interested in learning more about. Incapacitate and escape. Live to file a police report, or get a friend out of a bad situation. I would go to classes for this.
Thanks for posting!