Master Fabio Gurgel shares valuable insight on the nature of sweeping to Paul & Josh: Reducing the number of response-possibilities your opponent can make in reaction to your sweep set-up is a crucial part of successfully following-through and advancing one's position; e.g. in the case of Over-Hook & Elbow-Control from Butterfly-Guard, if you can appropriately apply the correct direction of pressure onto your opponent's shoulder to break their posture, you can catch them outright with an expected change of base. Extending your woven-arm in conjunction with your Butterfly-Hook creates a predictable shift in your opponent's base when they try to compensate. Fixating your opponent's option to posting out with their far-elbow is exactly the placement you need to induce a rotational mechanic as you look to pronate underneath your elevated hook.