Professor Lucas Lepri shows how to transition from half guard to butterfly guard and sweep an opponent to mount. When the opponent switches his base and escapes his knee in Lucas' half guard, Lucas repositions his grips and hooks and then lifts the opponent's leg to initiate the butterfly guard. With two grips on the belt, Lucas pushes forward with his hooks and turns his opponent, landing in the the mount position with both hands posting on the mat. Lucas finishes by sliding his knees underneath the arms of the opponent to secure a strong mount.