Your performance/natural face is a smile (: it makes everything seem smoother. My performance face is so concerned- thanks for the (unintentional) sweet reminder to not look so concentrated.
Always nice to see this in a video format in additional to still photos. I really like the top view, since it helps visualize the performance in three dimensions and gives an idea how far forward the hand moves when the arm "opens". I wonder if doing an "over the shoulder" view might be helpful so that we know, not only how it looks to the audience, but to the performer?
