20-Second reverse face warm-up

Done as part of a practice session with poses of 20 seconds in length.

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

Hello, y'all, Polyvios Anima here, and this is my latest face warm-up sketch, reversed. As you can see, I'm totally and completely observing the plasticity of the facial skul structure and facial bone shapes. So, what do you all think so far with my forces of the faces?