DRILL DESCRIPTION: Set ball against the wall repeatedly. Wait for the ball with hands 4-6 inches above forehead. Thumbs and index fingers form a triangle through which you can see the ball (triangular window). Rest of hands form the shape of a ball. Emphasize hands up early and keep hands up the entire time. You will have to set the ball relatively high off of the wall in order to keep this drill going.
Checkpoint: before you set the ball, see the ball come through the triangular window.