Found this little blog post on the AikidoJournal site on the potential problems of using techniques like nikyu and kote gaeshi against opponents high on drugs or full of adrenalin. Many valid points for any art that emphasizes these techniques, but especially the sister arts of Hapkido and Aikido, since we spend so much time perfecting these. Something to think about, when building your self defense game plan.
Phil Davison said:What I think will happen if you use Nikyo in a contemporary self-defence situation is that your enemy will simply stand there, and possibly hit you with their free hand. If you are skilled in applying the technique, you may well tear the ligaments holding their wrist together, and at this point the lock will not work at all, since their wrist has a new-found flexibility. They are unlikely to hit you with that hand for the next few months, but remember that they are now probably running on adrenaline, and have three other limbs to attack with. If you are not skilled in applying the technique, it just won’t work at all, and you may be in a worse position than you were before, because your opponent is now really angry.
With Kote Gaeshi it’s a very similar situation. Unless you have completely unbalanced your opponent in the entry to the technique I don’t think it is likely to work at all. If your opponent has six months of kickboxing or some similar rough-and-tumble style behind them they may well not give their balance away so easily.
If you are highly skilled, and you do get Kote Gaeshi to work as a throw, you are likely to cause serious injury to your opponent since they may not be skilled in falling, and they will not be landing on mats. Think about this for a moment: if you are defending your family against a lunatic this might be appropriate – but if your opponent is a drunk brother-in-law who you need to restrain, or if you are a security guard, or a psych nurse – well, this should not be your technique of choice.
I think many people underestimate how much skill is required to get either Nikyo or Kote Gaeshi to work in a real combat situation. Both of these techniques require very precise application – if the angle is slightly wrong the technique will not work at all. If the entry to the technique is not impeccable you will never arrive at that precise alignment. If your mind is not calm you will never achieve the correct entry. I think it would require at least ten years training to get to a point where the techniques are burned in to the point that they are viable in the heat of the moment.