I am tired of reading, "it won't work in real situations." If you are talking about rolling or competing, yes, it won't work. In fact nothing really works in a street fight. Pure anger, aggression, absolute craziness, added with the ability to psych the other guy is what will work. I've had real fights with other Marines, homeless guys with knives, gang bangers in jail, drunken guys, and even against a guy that threatened me with his BJJ.
Here is the absolute truth. If you fight, and the other guy happens to fight back, and your adrenaline and crazy factor has kicked in, no strikes against the head will hurt. If you scare him enough, typically, he won't fight. And when the blows start, adrenaline slows everything down. You will see his punch coming and if you have had training, your training will come to you. If your training is BJJ, great, you will take him to the ground, choke him out, etc. I got a black belt in hapkido and taekwondo. Even while I trained in it, I knew it "wouldn't work." In fact it did work twice. The first time I was in a shoving match against a bigger guy. He lifted me off my feet in a classic shirt grab. I froze, but when I finally gathered my composure, I twisted his head with a pressure point applied, and it ended the fight- that surprised the shit out of me. Another time, someone charged me, and I did a classic step out of the way, driving his head into a wall. Again, I was surprised the shit worked.
I've also bitten, stuck a finger into an eye socket, grabbed balls, and that shit worked too. I've kicked a homeless guys thight twice with my boot while he was holding a big kitchen knife. That shit worked too.
So, if I now want to learn an art for its art's sake, and learn how to cleanly throw a guy, or lock him into compliance and look good doing it, dont complain. In all my fights they were a bad asses, but I doubt they had any training. And that is the theory behind classical jujitsu- tricking. If a bjj guy is wanting to fight me, then he will know the tricks, but again, I doubt he would want to fight for bad reasons.
The BJJ guy who threatened me? He was just as scared as I was to make the first move. he was much bigger than me. I ended up throat striking him, and he called the cops. They dropped the charges, but tried to charge me for a police baton they found in my car, which was also dismissed. At the time, I was a green belt in a Japanese combat jujitsu (that rolled) and was prepared to roll, but he didn't react. Again, my psych out was scarier than his.
So again, let guys learn what they want. If street situations scare you, pull aside a guy that has really scrapped and ask him how these techniques could be applied. Learn to harness the adrenaline. Get over the fear factor. Remember that a strike won't hurt. And in jail? I've been jumped, I've had fight matches, they are different. Two guys jumping you is to try and scare you. You fight back and you get respect. Take a beating and it will be constant. In fight matches, they are not trying to kill you, just mutual combat for sport. Break his arm, or choke him out, and you better have back up or his gang will try and stab you when you aren't looking.
I like Danzan for all its throws, locks, pencak silat. Is it totally realistic? Nothing is.