Hermit, when you're working at frame rates that short, those little movements get really tough to carry off well. They simply happen too fast to be captured at that rate. What you can do is shorthand them a bit and abbreviate them down, so they keep the illusion. But that's about the best you can do when you're at 15fps. And incidently, lip synch at that rate, while not impossible, is a real terror. Just a heads up.