Just a bit of CC, make his head have a little bit more movement right now it kind of looks like he is wearing some kind of brace that is keeping him from moving it a lot. Next in one or two of the frams when the arms are in the front, it kinda looks like the part by is hands are sagging which looks strange. And lastly his back is in kind of the same condition as his neck, in that it needs movement, because right now it is perfectly straight, except for maybe one frame 
thanks for commenting, I'll check it.
the hands and legs are mirror just before de four(4) frame. it have 8 frames.
mirrors because they are at the same position in the 4 frame loop. if one frame have a problem, it should be two.
. I think. 