Masking and Replacement Animation

So the more I use After Effects, the more comfortable I become. I think that I have worked out all my kinks, all but one, to create smoother transitions in between frames for replacement animation. This assignment was pretty interesting and quite fun. It did take some time for me to figure out how I was going to set up the animation in photoshop, but after that setting up keyframes, nesting, creating new comps seems almost second nature.