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...
The problem with Nikyo and Kote Gaeshi
The problem with Nikyo and Kote Gaeshi