When you're playing a spirit from another dimension, you really can do anything and get as abstract as you want and still have a context that will work within the movie. I wanted Ghost Rider to move in a way where it would be like a bad dream. I thought about cobra snakes, and the way that they will show you their backs and sway in a rhythmic motion and almost lull you to sleep before suddenly attacking. Well, I put that into the movie. And I decided to move my head in the jerky way a praying mantis does. So, I did all these things to give the movie a feeling of otherness.
