He looks like he is vibrating. Interesting effect and shows you never know what will happen when shooting blurs. BG color is cool. I like the wing down position and that shows how shooting at faster shutter speeds (1/60 to 1/25) as you did here can get the wing in a stroke without the beating pattern slower speeds get you.
I know you know that. Just pointing out why certain things are the way they are in this image. Nice work.