Comment by mr_toad
The horizon is the distance at which escape velocity is c.
Closer to the centre, including your feet, the escape velocity is higher.
Electrical impulses wouldn’t be able to travel from the bottom of your brain to the top, so you’d be unconscious anyway.
It is absolutely untrue that GR predicts that you would be knocked unconscious crossing the horizon. In fact one of the most fundamental aspects of GR (equivalence) predicts the exact opposite - there is no local experiment you can do as a freely falling observer to detect the horizon.