30-Second Color-Scale Expression Loose Sketch

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 my facial muscles, in terms of my facial anatomy.

This is my latest sketch I've done last night, too warm up; or I should say, loosen myself up in terms of my Hirschfeldian touch in terms of my line quality. As you can plainly see, I'm really getting in touch of the subject's feeling, vitality, and humor, in my many decisive edges. What do you think????