30-Second Hands and Feet Bone Structure Warm-Up Sketch

Done as part of a practice session with poses of 30 seconds in length.

My current goal is: Improve my understanding of hand and foot bone structures.

Hello again! Here is my latest 30-second hands and feet bone structure warm-up sketch. It's very scribbly, and it just completely and totally loosens me up, and I'm really having a ball. Please comment and share??