Speaking of MMA and nikkyo...
Here, Aoki wins a match in a brutal manner. Under duress, he applies the technique demonstrated above, with a violent twist of the whole body, while, running out to the center of the mat. On some of the MMA forums, most had no idea what he was doing here. It looks like a elbow lock variation. This is a d*ck move, I think, even in competition. His goal was to clearly go for the injury before the submission. The guy NEVER had a chance to tap. Look for yourself and see just when the guy realized his was beaten. Also, look where the injury occurs. Really nasty but effective.
The video looks like an applied hiji-shime to me...http://youtu.be/D5qw7n1koh8
But this technique is that it is extremely effective and if uke is at all resisting, there isn't much "slack" in the system so the technique isn't forgiving. I remember being called up to demonstrate as uke in class for a hiji shime and I hadn't quite gotten the ukemi down AND my mind wandered at exactly the WRONG time. Oh, nothing snaps (then crumples) you into the present quite like a hiji-shime.
I wouldn't call it a "dick move" though. The guy just left his arm out there and was punching him with the other... it is MMA after all.