18 Second Face Warm-Up Sketch

Done as part of a practice session with poses of 18 seconds in length. My current goal is: Improve my understanding of the forces of the facial skull, in terms of my facial anatomy. Here is my newest face warm-up sketch here. As you can see, I'm still doing my best to get the feeling of the facial skull here. Not to mention the fact that I was completely exaggerating the skull's proportions. Well, what do you think? Did I do a great job distorting the forces of the facial skull?? Or am I all set???