Wasn't one called because he was in his balance point and just stopped because he lost his balance or something? I was on the phone so wasn't watching that closely.
The other one which I think you are talking about is he flinched his right arm / shoulder. His hands were apart and his right arm moved very slightly. Then he stepped off and raised both his arms above his head. I think they got him on the flinch saying the movement committed him to bring his hands together to the full set position. It was a very minor flinch and I didn't see it until they showed it slow motion.