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It looks like it is sitting in a wire holder, similar to the egg holder in an egg coloring kit.
yes, there is liability because of Newtonian law for every action force, there is a corresponding reaction force which is equal in magnitude and opposite in direction. If it was truly free it would have been pushed out of the camera view immediately.
What I believe they mean by "free" is that it is not in any container.
As far as why it is important to have spent money on this? I'm not sure, but I could easily see from this clip alone that the small scale replica of how the body mass reacted to such forces is a smaller scale planetary reaction to outside forces.
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