Hi @ dayleeo, very unusual and brilliant hunting.
Every step that a man does is means that he has been using energy to squeeze 75 kg from one to another.
People do not think about the steps that way, because it "implies".
However, in the steps we see how much energy is needed by 1 step.
Now, when this energy is "stealing" or transforming into the accumulating energy in the battery, the genius of these tiles is seen.
We can only imagine their possible mass use ...
For example: Pedestrian zones - that would be mini power plants ...

Good luck with hunting.