2 Part Technique - Stand inside your opponent's Butterfly Guard, gaining Collar & Elbow Control, and cut your knee across his lap into Side Control with the Knee Slide Pass. Keep control of his head, jamming your forearm into his collarbone so he cannot gain his own underhook against you. If he begins to frame your crossface, swim around his arm quickly before it becomes a larger problem and establish with Underhook & Head Control. If you feel he is turtling over before you can settle him down from the Collar & Elbow Control, snap his head away as you spin onto his back for the Seatbelt.