structural:expansion, quality:corruption, linguistic:voice_change, structural:reformatting
Back mount

When taking the back mount position (often known in Brazilian jiu-jitsu as the back grab or attacking the back), the practitioner attaches to the back of the opponent by wrapping his legs around and hooking the opponent's thighs with their heel, or locking in a body triangle by crossing one shin across the waist like a belt then placing the back of the opposing knee over the instep as if finishing a triangle choke. Simultaneously, the upper body is controlled by wrapping the arms around the chest or neck of the opponent. This position is often used to apply chokeholds, as well as arm bars and triangles, and neutralizes an opponent's potential size or strength advantage.