Originally Posted by
Merryprankster
negative,
I am sorry. This sounds like it was totally ****ed up. Congrats on coming out alive!
On a totally non-******* note, it does, in fact, sound like you may have applied it "wrong."
The Rear-naked choke is a blood choke in pure form. They can continue breathing more or less unimpeded, and the restriction on the jugular veins causes blood pressure inside the head to rise. This cuts oxygen off to the brain VERY quickly, as the heart can't pump oxygenated blood through the carotids because of back pressure. The fact that his neck collapsed like that suggests to me that you were probably applying a windpipe choke. Not wrong (hence my use of the quotations above), but much slower acting. I have put people out with both (they wouldn't tap), and there is definitely a difference in time.
This does NOT mean that I'm saying "Hey you *******, you should have done it better," or second guessing your judgment - or your empirical take away from this in any way. I am also not saying that he wouldn't have had time to stab you if you'd done it differently - for all I know - you did apply it correctly, and this guy was just tough to take out. You acted, which is more than most people can say.
By way of fallout, you may wish to consult/find a lawyer. I don't know what this fellow's background is like or anything, but there is a possibility that his defense lawyer may try to play up the idea that you had placed him in a "lethal choke hold," and therefore our 250 lbs friend was in a "fight for his life," and used a "non-lethal technique," (ie, stabbing your arm) to get out. While this will probably have few criminal implications for you, if the defense is successful, he may have stronger grounds for a civil suit. This won't absolve him of the original assault, but he might get off on using the knife on you, and if that happens, he might try and take you to court for civil damages.
Don't get me wrong, I'm not in support of this guy, I'm just thinking about "what might happen." Sometimes, wierd things go on in the legal system, if one party is unprepared for the fallout.
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Having a friend who has trained in bjj for several years and who is a ripped MO FO, 6' 205lbs, we did a little demo with a training folder. So you have two guys, one a regular bjj practitioner, and the other a knife nut with no real training other than his own. They squared off, the bjj guy lunged in and took the knife guy straight to the floor (very impressive), however, the knife guy had his folder deployed rather quickly once he hit the floor. While the bjj guy could have clearly wooped him in an empty hand match, the knife guy made a nice slash across the bjj guys neck once on the floor. This would seriously change things. This was just a senario/practice routine we tried out. I tried a go with the knife guy as well using Wing Chun, but would have been slashed up bad. 
It's too hard to keep track of that little blade once it's deployed. NOTHING like in the movies. I understand that this is just one senario, but it's really naive to assume you can prevent the knife from popping up on you. It's better not to try, UNLESS you have to. This is just my personal experience. I thought it would be more realistic to try it with a buddy who is a knife carrier, but with no formal training. He practices deployment speed, gripping and such, but has not been trained in Sayoc Kali or any others. I'm sure our opinions and experiences will vary, but IMO it's really not safe to say you can control someone from deploying a blade. People will always surprise you. 
Just my opinion. 
