Professor Lucas Lepri teaches safe guard recovery and a reverse armbar setup, emphasizing posture control. After recovering closed guard, he shows two scenarios: if the opponent bases their hands, he controls an arm with a cross-collar grip, using leg strength to maintain pressure and then sets up a reverse armbar by extending his arm and angling his hips. If the opponent maintains collar grips, Lepri traps an arm, secures the cross-collar grip, and uses leg extensions and hip positioning to create space and apply the submission, stressing the importance of keeping the opponent away for optimal pressure on the elbow.