Heads and Hands shenanigans

My latest assignment in heads and hands was to draw a series of 4 mouths (or rather, my mouth in 4 poses). When I was done, I realized that since I had photographed myself at basically the same angle in each picture, and that the series of drawings might sync up quite well. I did a little research on animated GIFs, and came up with this:

It's FAR from perfect, but I was delighted nonetheless that I ended up with a decent approximation of a mouth chewing. I'm also glad I finally caved and learned how to make animated GIFS.

Edit: These white specs show up when I view my GIF in the web browser; can anyone tell me what that's about?