Drawing While Taking Notes

Disclaimer: If you are uncomfortable with drawings of the human figure, this may push your comfort zone. 
Sometimes, while I’m taking notes in class, this happens:
Although you can probably guess from the notes, I removed the class name from the upper right-hand corner.

From last year and based on this

3 Sketches of Hands

Today, I realized that I hadn’t painted/drawn anything (more than a doodle) in a while.
When I put my computer down and took out a pencil, the following set of quick sketches resulted:

Here are the individual sketches in higher resolution: