2 Part Technique - You may end up losing upper body control upon entering for the Hook Sweep from Butterfly. When this happens, take advantage of the open space while your opponent is posting to capture Underhook & Head Control from Butterfly. Elevate your underhook's elbow to remove his ability to post on that side and do the Hook Sweep again into this undefended side. If he happens to pass into Half Guard while you're controlling him by the Underhook & Head, drive your forearm into his collarbone and bridge him over for the Underhook & Head Control Bridge Sweep from Half Guard.