I just watched this for the first time. I watched it two more times because I couldn't believe how fast he went from wrestling to being out. Thinking about it now after seeing it, I would be pretty upset that this happened and did not get reviewed by whatever rules committee that could make an educated decision as to whether it was legal or not. I don't have a lot of experience seeing this particular version of the front headlock, but I think that I have witnessed enough matches and enough front headlocks to know that something didn't look right.