"Bear Trap" Calf Slicer from X-Guard

[@shaemez]

can you explain why make the figure four on the legs (on bottom), then disconnect the figure four (when sweeping), only to connect the figure four again (after roll)?

[@jameswhelan1066]

When he is on top, the foot is held into his hip by the force of gravity, and the fact that his movement is limited by the floor.