Thats awesome scrap and mysterious at the same time lol do you mean, those that dont use the ground as leverage rotate thir feet, but those using the ground and grip opimally appear not to be using thir legs, but thats because they are getting leverage from the ground and not loosing any leverage by allowing "give" in their feet?
But they still cant get the same drive from their legs this way but they might be getting a more forceful rotation!?
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