Its not really unique...A lot of people use it, just not as a finisher. they also use it correctly. Using it in a standing position does nothing but stretch out their back, where if he fell to the mat, it would actually torque their neck, and turn it into a finisher. He could even drop to a knee, as Ultimo Dragon did, and it would be a lot more effective, and actually look like it.
I was kind of pissed they gave him that finisher. I understand a submission move makes sense because of his MMA background, but make it one you might actually see there. There's plenty of nasty finishers he could have used that would look better.