29-Second Upside Down flipped Face Warm-Up

Done as part of a practice session with poses of 29 seconds in length. My current goal is: Improve my understanding of the forces of the facial skull, in terms of my facial anatomy. Attendant is my latest 29-second upside-down mirror face warm-up sketch. As you can look, I'm totally and clearly caricaturing and distorting the forces of the facial skull. So, what do you think????