I had originally planned a "wind" concept for this look, but as I was working though it in post, I thought it made a better story something a bit more spell caster based. The sky, at this time, didn't have an interesting cloud in it. It was a typical gray Michigan sky. Without the clouds, I couldn't quite get the mood I wanted for wind. However, for the birds, it was perfect. This sky worked perfectly for an eerie feel.