But he said sometimes when we react in certain situations, we don't use our brain, instead we use the spine, which takes no thinking, and is almost a reflexive action.
What you've described is
exactly the physiological process of reflexive action.
Look it's kind of like driving a car. You steer, but in certain situations - like you barrelling heardfirst into a lamppost - the car decides to fire the airbag charges. The good news for you is that you train how your reflexes work, which is what martial artists or video gamers do. Free will, again. You live in a body that exerts certain influences, influences dictated by evolutionary outcomes, but you still have ultimate, or at least proximate, control. Free will.
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