Instructor : Shin
First choke involved gripping lapel under Op (in turtle) while gripping collar above his neck, planting knee by his head and rolling him to mount to finish lapel choke.
Next was sinking inside knee deep into Op's rib cage and stepping over with outside leg to place calf against Op's neck, then lowering to knee of stepped over leg to close the space, then rolling to shoulder to close the triangle choke. This one was very difficult.
Sparring.
