30-Second Upside Down Face Scribbly Warm-Up

Done as part of a practice session with poses of 30 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 my first face scribbly upside down warm-up sketch. As you can see, I'm really working on exaggerating and satirizing the forces of my facial skulls. What do you think? Please comment??