27-Second Upside Down Expression Warm-Up for Loosening Up

Done as part of a practice session with poses of 27 seconds in length.

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

This is my latest sketch, for loosening myself up. As you can see, my forces are slowly coming second nature to me, but not completely, yet. So, what do you all think of how great my progress is?