28-Second Flipped Upside Down Face Warm-Up Sketch

Done as part of a practice session with poses of 28 seconds in length.

My current goal is: Improve my understanding of the forces of the facial skull, in terms of my facial anatomy.

Here is what I've done so far tonight. As you can plainly see, I'm really loosening up my facial skull and my perception and observation of edges.

What do you think of my progress?