I mean, they take techniques from other martial arts like Jiu-Jitsu,Kickboxing,Karate,Taekwondo,Muay-Thai and use them to bring down the opponent, to continue beating him/her when he/her is already on the ground. Where is this an own martial art ? This is more likely combined use of martial arts and abusing them. I am a big fan of full contact in martial arts like kickboxing,boxing or even Karate, but I think all the " borders " are crossed when you hit somebody who is already on the ground, this has nothing to do with martial arts, this is just having a dirty fight with someone. So how did it happen that we call MMA an own martial art now ?