A full person in front of you like a mirror guide that does the moves at a slow enough speed to follow so that you can see exactly how to do them.
If the pose has MORE THAN ONE PART, like the structures, then there would be little moving arrows that move around the hands to EMPHASIZE the importance of the rotation!
If the pose only has ONE PART, like the modifiers, then it would just be still without an animation.
Putting small text descriptions beside the figure like "palm up, fingers forwards" would also be good for clarity!