Seriously, if you don't know that the choke he has on you is called an RNC, you really shouldn't be grappling. And I dont say that for any elitist type of reason, but you could really get hurt or really hurt someone trying to do something you really have no clue about. You ever see Jackass or similar shows? The disclaimer "Don't try this at home" is for YOUR protection. The same thing can be said about martial arts. Really, don't try it at home if you don't know what you are doing and have no professional training. Its one thing to wrestle around with your buddies, but its a completely different (and dangerous) thing to throw around choke holds when you are obviously not prepared to defend against it let alone apply it correctly.