30-Second Flipped Grayscale Face Warm-Up

Done as part of a practice session with poses of 30 seconds in length. My current goal is: Make my forces of faces and expressions less stiffest and more dynamic,energetic, and fluid. Here is another flipped grayscale face warm-up sketch. I'm working on the insurance that I'm much greater with the forces of the faces and expressions, and to make greatest progress on making the forces of the faces least stiffest, and to make them most dynamic, energetic, and fluid. My goal is currently complete. What do you think of my warm-up sketch, huh?