Professor Lucas Lepri explains how to attack with the omoplata from spider guard when the opponent is on his knees. Lucas first attempts to sweep the opponent, but when the opponent resists the sweep Lucas bends his spider leg, breaking the opponent's posture, and attacks with the omoplata using the other leg. Lucas then grips the opponent's back and sits up with his legs straightened, switches his grips and leg positioning, and finally drives his hips forward to finish the omoplata submission.