Holy shit!
If I were to draw something like this it would take far to many hours for me to even bother starting on something that would take so long. But you doodled this in class? I draw really well in my opinion, but this is beyond insane. And this is just doodling. After I write this review I'm gonna see some more of your artwork to see what you can do when you're not just bored. Haha. Nice work, I'm incredibly impressed.