Professor Lucas Lepri details how to counter an opponent attacking with a single leg, turning a defensive position into a direct submission finish. Even if the opponent locks the hands together, Lucas keeps the trapped leg extremely heavy and grips deep on the opponent's collar. From there Lucas controls either the opponent's arm or grips the pants at the knee, pulling the opponent’s knee tight into the body while tucking the elbow inside and keeping the head leaned out. To finish the submission, Lucas leans the weight forward, drives the elbow in deep, and continuously walks forward into the trapped leg until the extreme pressure forces the tap.