Professor Lucas Lepri details how to attack an opponent in the turtle position by trapping an arm and transitioning into an armbar. Controlling the back while the opponent stays turtled, Lucas catches the arm on the head side, places the hand on the thigh, and steps the knee over to trap and isolate the opponent's limb. With the arm completely immobilized, Lucas slides the hips out to the side to establish the finishing angle, placing the leg across the neck while keeping the knees staggered. From here, Lucas secures the wrist to extend the arm directly, maintaining tight knee pinch and hip pressure to finish the submission even if the opponent rolls or tries to strip the leg.