I would think that aside from the external physics of the problem, ie, momentum vs gravity, there is the biological limits of your skeleton and muscles to consider. Your body is just not equipped to deal with that sort of repetitive stress and at some point you will break. That may be by exerting too much force in your "takeoff", or the landing my tax your joints' abilities to absorb the impact.
Both of which factor in a remarkable amount of pain to let you know that you're alive.
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After all is said and done,
more is said than done.
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