You forgot Law Enforcement.
That said, I used the words "street/pub brawls".
This is a big difference
When a brawl is underway, no one was ever interesting in grabbing a wrist.
Rickster is right (for the most part). As the saying goes (or at least as my friend Chris McKinley said succinctly- "don't chase a lock"). Why I am asking the question for clips other than the like of the above provided generously, is that I think these rules laid out by ERLE MONTAIGUE (from 1999 at the latest), are words of wisdom;
"Art of Fighting 6/. Never use a lock or hold as your main fighting method.
Locks and holds do not work in a realistic fighting situation. I have discovered this aspect of fighting through my own experiences and from that of others who have survived street attacks. It is all right to use a lock to control an attacker once he has been disabled by using a point strike or some other striking disabling method. However, if you try to use a lock or hold against someone who is trying to harm you, then you will lose the confrontation. This is especially important in the street when it is not usual for only one attacker to be attacking you! In these cases, you would never even attempt to use a lock or hold as his friends would have a chance to attack you at this time. Stun the attacker with a strike to the temple (GB 3) or another vital point, then you are able to take a lock or hold. This is greatly important when fighting against an armed attacker. Most schools will teach that you should grab the hand that is holding the knife or other edged weapon for instance. These methods work fine in the dojo but in reality, you are inviting defeat and or even death to use such methods. You must remember that an attacker, especially one who is holding a knife, must be pumped up in order to have the aggression necessary for such a deadly attack. So grabbing his arm is not going to stop him. In the dojo, you might be able to use a technique such as in
(Photo No. 4). But if the attacker is serious about doing you harm, and he knows what he is doing, he will probably make use of his yang energy to rip your hands and arms to shreds before bringing the knife back to kill you.
(Photo No. 5). &
(Photo No. 6).
In the case of an edged weapon in the art of fighting remember the three words; evade, bump and attack. Without writing a whole book on knife defence it goes something like this.
Evade: He perhaps attacks using a lunge. (The same methods work for any type of weapon attack from anywhere). Using a 'hinge' type of weapon, you move your body out of the way by slightly turning to the side as you slam his arm so hard that it damages his arm bumping his weapon arm out of the way for that split second.
(Photo No. 7). Notice that my right palm is already up ready to strike to deadly vital points. In doing this you have done the first two of the words, 'evade' and 'bump'. You have also stuck to the above rules of never backing of and never using a one/two type of method. Your defence has become your attack. Now I am able to strike using deadly methods to points that will either kill or drop him.
(Photo No. 8). Then, and only then, when he is down and out should you take the knife. The 'hinge' type of attack is also one of those that will bring up the reptile brain causing your energy to build up to a high level for the final attacks.
Using the reptile brain in the art of fighting works like this, every time you touch the attacker, your own energy will grow causing you to want to continue. Your own energy system will be enhanced by the fact that you are borrowing his energy and sending it back to him. You are using only one bit of energy and recycling it. In this way you do not feel tired having to block, then build up more energy for the next attack etc. Your first lot of energy (Qi) is re-used through the attacker's body draining him of energy and building yours up.
Art of Fighting 7/. Never use pushes or pulls in self-defence.
This may seem contradictory as most people view Taijiquan for instance as having many such techniques. Baguazhang and Xingyiquan (H'sing-I) do not have this idea though. I think that the idea that Taijiquan has many pushes and pulls comes from the incorrect idea that the training method of 'push hands' is in itself a martial art or self-defence art. Or in some way a fighting technique. However, push hands should never be thought of as a fighting art by itself. It is only a training method that teaches us timing, balance and how to move the body when attacked. The attacking methods in basic push hands are only there to take the place of the more realistic types of attack and defence so that the practitioners do not harm each other. So if pushes and pulls do not harm people, why use them for self-defence? The only time you could use a push or a pull is to put the attacker into the line of an oncoming car. The pushes are only there in order to teach the very dangerous dim-mak point strikes inherent in all Taijiquan forms. However, you will still see articles in prominent magazines on so-called Taijiquan self-defence methods and the art of fighting where the practitioner will use a pull or a push to defend against attack! It is my advice to leave a class immediately the teacher begins to teach you to do this is a realistic fighting situation. He is being fraudulent in teaching self-defence that isn't. And it is dangerous for students to have a false sense of security instilled in them by using these inane fighting methods in the class. Sure, they might even work to some small degree in the class, but it's a completely different matter in the street when the attacker is really trying to get you! I have seen teachers teaching small framed women or men to use techniques such as 'Lu' (roll back) in defence against an attacker.
He attacks with a punch so the attackee defends using P'eng. Then she takes the attacker's arm and uses 'roll back' to put him face down in the dirt! Anyone who would use this type of defence for real is inviting disaster. But this all comes about from teachers not knowing the advanced methods of Taijiquan like the 'small frame'. Moves such as 'Lu' (roll back) take on a completely different meaning when used in the small frame mode. If we again take the above scenario when we are attacked by someone with a right straight punch, we might again use P'eng. However, this time we do not move backwards, but rather move our weight forward as we do this thus putting his timing off. Now, in small frame mode we use 'Lu' but very quickly to deflect his power and again as we are still moving forward. We do not use it to pull him forward, only do deflect his energy for a split second, thus causing him to have to try to move back to regain his balance. In this window of opportunity, we should attack with devastating point strikes to vital points on his head and neck, like ST 9 (stomach point No. 9) using the right palm, and next to GB 3 (gallbladder point No. 3, temple) using the right elbow. We could finish this if he is alone by now, and only now, taking him down using our left leg while thrusting the left arm across his neck. Following this with fingers to the eyes while on the ground to completely control him. This last method would of course only be used if you were only being attacked by the one person. "
http://www.taijiworld.com/art-of-fighting.html
Oh, also, to segway back to the wrist control issue: I think Controlling someone can be MUCH MORE DIFFICULT than simply hurting them. Your drunk friend at a party, or the resisting suspect being cuffed, etc. is harder to not damage the more violent he gets. If there are more considerations like: more skilled aggressor, if weapons involved, less reaction time you are afforded by circumstance etc---it all matters.
Best,
Gary
Also, switching between different kata at will hadn't factored into my reply so apologies for that.
