I've been away from the forum from a couple of days and arq rockets forward.
Nice progress there!
Allow me to provide some feedback on your last three animations.
1. The getting up animation: I traced the problem to the body being leaned too far at the time when the feet touch the ground. It's physically impossible balance-wise that the body reclines back up without any support. Making the torso more vertical at that time will require making that bend more violent, which will probably help too.
2. The dizzy animation: The hands are moving too much, in a way that would require him to move them around voluntarily. You should pay attention to the motion of the shoulders, and just make the arms dangle freely, moving only from inertia.
3. The fall down: The torso falling is a bit too stiff. You should probably arch the body backwards during the fall, pulling the pelvis forward first, and then letting the (absent) head whip into the ground. Also, the fall is stopping when the forehead hits the ground, the neck remaining rigid. It should go as far as the shoulders and clavicles touching the ground. About removing the head, can't you encase the head in a box and delete the head via a boolean operation?
It's great to see you actually managed to pull through.
Liu is almost complete if I recall correctly, isn't he?