Which technique involves controlling the subject's knee to create space for escape?

The technique that involves controlling the subject's knee to create space for escape is the elbow escape. This maneuver is designed to allow an individual to reposition themselves in a way that enables them to create distance between themselves and a subject or opponent. By controlling the knee, a practitioner can manipulate the subject's posture and weight distribution, which can facilitate a successful escape.

The elbow escape is often utilized when one finds themselves in a more dominant position, such as being on the bottom in guard, where it's necessary to generate movement. This movement disrupts the balance of the opponent, making it easier to create space and ultimately achieve a more favorable position or escape.

Other techniques, while useful in various situations, do not focus specifically on controlling the knee in the context of creating an escape. For instance, the guard break is primarily about breaking an opponent's guard to advance one's own position, whereas the bridge and roll aims at reversing an opponent when pinned, and full mount stall typically does not involve escape but maintains a dominant position. Thus, the emphasis on knee control in the elbow escape highlights its effectiveness in generating space for an exit.