Professor Lucas Lepri demonstrates a reversal from the half guard so he ends up on top in his opponent’s half guard. The situation begins with the opponent in Lucas’ half guard. The opponent slides his elbow down to block Lucas’ hips, and Lucas traps the arm while also blocking the bicep with his other arm. He steps his outside foot on top of the ankle on his other leg. He attempts to bridge toward the side where he is blocking the opponent’s bicep, and when the opponent resists, Lucas bridges in the other direction, sweeping the opponent. He releases the bicep and applies the underhook, and with the other hand he applies the crossface and grips his hands together.