I've seen that episode of Human weapon and all the others, and the fight quest episodes. They are entertaining to watch, but some things come up that are irks about MMA fighters. That episode they do Taekwondo, The Kukkiwon style. Jason Chambers is a JKD concepts instructor and is or was an MMA fighter. He tried doing a tornado kick, during the fight at the end, and injured his knee badly. When I started getting back into TKD after being inactive, the first or second day there I pulled a muscle or tendon below the knee, while warming up, then funnily enough he had us doing tornado kicks, and I tried it and it made it worse so that I was out for two weeks. It was so bad, for atleast several days, walking was hard. After that I made a point of stretching properly before class, even if the school didn't so much. And I never hurt it again. But Jason chambers was active in martial arts already before the show, and still... It seems there is no guarantee that a MMA fighter will be conditioned properly. That show, they show them learning Taekkyon and Hwarang Do. There are some passing comments that those are the roots of Taekwondo. In "A KIlling Art" Alex Gillis gives a lot of information on the History of Taekwondo. For awhile in and around the fifties, people were still debating what to call it. Tang soo do, Taekkyon, or Taekwondo.