here's my 3rd. shoot, I think changes are noticible, no head bouncing, fixed right arm, legs animation smoother, hair is not changing due to the animation.
Looking -really- good now.
The legs' animation looks great.
The right wrist is still curling downwards awkwardly though.
I think that position looks awkward because they reused a frame that was supposed to be part of the animation of him jumping forwards and curling into a ball. See that
here.
In any case, going by
this sprite his hand should stay in a mostly vertical position instead of going horizontal (edge down instead of palm down) during the jump.
That said, if I was to make it look more normal, his hands should go into a more tense position, not a relaxed one.
To achieve that, I think the hand should go almost fully vertical (edge down) and his fingers should straighten.
Keep some curvature to the fingers, but I gues the hand should get close to being fully open while in the air.
When you got this right, perhaps you could try something similar with the other hand.
But this is just a suggestion.
If you decide to stick to the original I'll understand.
Also, if anything, his head should whip forward, not backwards when falling.
Finally, is it me or you're tilting his head away from the camera?
If you're not, it's probably that you're using a very wide angle lens again.
BTW, haven't you got around to fixing the shoulders? The shoulder joint looks dislocated. The joint should be -inside- the torso, and not to the sides as it currently is. That will probably fix the negative space inside his left elbow, not seen in the jumping animation.