Again, the small details make this animation feel more alive (or undead in this case).
The shifting of his foot and the opening and closing of his hands really bring out the character. Like he actually is looking for something or someone.
I think my only crit is that the whole body hits the poses at the same time (head, chest, hips, arms) and drifts equally during the moving holds. I think it would look better if the head leads and the arms and hips settle into the pose later, OR since this is a brainless zombie maybe the opposite: have him twist his body first and led the head follow.