I've been working away on getting the film done and here is an example of what the mouth is gonna look like. I did some experiments to see how a traditional boil would look. I found it to be a little too distracting for the style so I've gone with just a plain traditional 2d style. It still has some movement and life but now it's easier to adjust to the mixed media. I'm animating this all in flash and redrawing the mouth frames, but I've established symbols for the teeth so that the skull physics still works.