It it normal for my snake to eat like this?

My Ball Python eats with his head upside down. After he strikes he'll almost immediately turn his head upside down.
http://img.tapatalk.com/d/14/08/01/a9enezy5.jpg

Mine does that sometimes. I don't think there's anything to worrie about.

I've seen people mention one of their snakes does this. It's probably just a slightly wonky snake and nothing to really worry about.

Thanks :) this is my first snake and I tend to worry too much. Lol