He keeps his elbow at an obtuse angle and the blade of his forearm under Brandao 's chin .
He is able to stop his opponent from changing levels , grabbing a strong clinch , or getting his back off the cage .
Keeping his elbow at an obtuse angle and the blade of his forearm under Brandao 's chin , he is able to stop his opponent from changing levels , grabbing a strong clinch , or getting his back off the cage .