Such an awesome move.
I wrestled in high school and was a big time leg rider. I used to use something similar to that all the time. It is illegal to grab just the head, so I would grab the head and opposite arm with the opposite leg in. Guaranteed pin if you could get it.
I would have never thought to just grab the head. I can't wait to add that to my jitz arsenal.
Eddie Bravo is the man.
Edit: Just watched Bravo's video. I love that he talks about the source being wrestling. That was my bread and butter.