Here's a good example I found on Exotics by Nature's website showing photos from Daytona 07. If you look at the link and page down, there is a group of super cinnamon photos. A good example can be seen in the head shot with the white background where you can clearly see the concave head shape. It's also easy to compare the profile with the photo above it where the snake's head is pretty much in the same position.
http://www.ballpythonmorphs.com/07daytonaphotos.html