For example, standing on the edge of a cliff. Why do our knees buckle? What causing our legs to shake and go weak?
Shouldn’t our instincts do the opposite so we don’t have an accident by falling?
Adrenaline surges, blood flow increases bigly, high muscle tension, blood pressure shoots through the roof, nervous system engages into hyperdrive. Your legs are trembling because you are full of energy.
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