Panel Transitions Using Black and White Shapes

These are like, waaaaaaay old, from my Intro To Sequential class, but my BFF is taking the class now, so I'm scanning this assignment for his benefit. It's basically just doing a variety of panel transitions, using only black and white shapes instead of lines. It's not an easy assignment, and requires a good knowledge of how light creates shadows and what not. Once I got used to it, I found it really fun to draw like this X) I'm using a similar technique for a Materials Project I'm working on now (I will be the master of spot blacks dammit!)

I think I'm missing a couple... but you get the idea X)