Professor Lucas Lepri demonstrates how to get the reverse armbar by transitioning from the half guard to the butterfly guard. Lucas has the opponent in his half guard and the opponent changes the base. Lucas lifts his knees so he can reach for the opponent’s knee. He then hooks the foot and raises the opponent’s leg. As the leg is raised, Lucas then brings his knees inside and gets the butterfly guard. The opponent tries to posture up and Lucas immediately traps the arm, slides his hips out and brings his leg over to finish the reverse armbar.