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?
In: Biology
This question was already asked and here is a [good response to it](https://www.reddit.com/r/explainlikeimfive/comments/40taii/comment/cyx2zkr/?utm_source=share&utm_medium=mweb3x&utm_name=mweb3xcss&utm_term=1&utm_content=share_button)
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