I often forget to draw the wings on pegasus ponies, this time I'm actually doing it intentionally. Yay.
Anyway, the theme was "Draw a pony walking", and an angry walk is definitely appropriate for that.
Edit: It's a little bit late, darn.
make the eyes a little bit squinter ad show teeth too.
those eyes make it look like she is stressed and sad.
also make the eyebrows 1 straight line.
I didn't feel so bad about forgetting after that...