
Knee pinned across their stomach, mobile and heavy.
Knee on belly scores 2 points and is a great place to attack from. You keep your opponent pinned with one knee while staying mobile on your feet, so you can follow them wherever they move. When they push to escape, their arms come up and become targets for the far-side armbar and the baseball bat choke.
Keep your weight on the knee, not on your feet, and grab the collar and belt to steer them. When they move, move with them: step to mount, switch sides or drop back to side control.