Kind of a dick about it though huh? Looked like after the guy tapped and the ref told him to break he held on an extra second or two. Maybe it was just the angle from the camera and he had released. Nice sub though.
Na I think it's the angle, he probably takes all of the pressure from his leg off the throat, and just gets excited and screams. He doesn't seem to hold on at all. Remember his leg is on the guys throat, he has to be careful and can't just jump off of him.