Décosse shows us how she dominates the sleeve of right handed opponents. One of her keys to success.
Décosse teaches us how to control your opponent using a cross grip, and an arm around the back.
We see Décosse use her variety of gripping techniques in competition.
This forward twitch is done when Burton has a strong sleeve and lapel grip and his opponent is in a defensive posture. To break their posture he twitches forward.