Snake Animation

So I’ve been working on this animation for a few weeks now and I was hoping to get some feedback. Eventually the idea is to go for a Harry Potter type scene. I have a title sequence created in After Effects and I want to create a smoke simulation in the shape of the snake and have the actual snake emerge from the smoke. There’s something off about what I’ve got so far but I can’t put my finger on what it is. I’m fairly happy with the materials (apart from a few UV issues I still need to work on) and I know the lighting needs a lot of work. I can’t decide if its the camera movement or the movement of the snake that gives it an artificial look. Any feedback is much appreciated.