I just do /shrug

Overall I just have very good memory retention as well as various traits relating to connecting things in ways most don't or won't consider. Call it autism or apophenia or whatever it's just how I work.

A lot of this is just general biology info dealing with the endocrine system and other critical vascular pathways and what happens when those systems are stimulated, even just in minor ways.

The ankle/adrenaline thing is one of the reasons we as a species are so successful because we can take a horrendous amount of punishment compared to other animals that would go into shock far more readily then die. Meanwhile humans have hyper-reactive scar tissues so while we might later look like we have gone through a meat grinder, and in some cases involving animals attacks technically have done, it's still something that can be survived.

Keep in mind as a species we can walk down horses. Not run them down, walk them down. We can't out run a horse, at least not in the short term, but we can walk, and walk, and walk for hours and hours to the point anything we choose to chase eventually dies to exhaustion or from being herded off a steep drop. If that doesn't work we use tools and throw sticks and rocks.

But that's not to say we still aren't easily stopped. Fuck up the sinoatrial node of the heart in some way or interrupt the regular heart beat and you can cause a heart attack. Turn off blood/oxygen to the brain for only a few seconds and we collapse. It gets folded into a loose concept of a "rule of 3s". 3 seconds without blood/oxygen to the brain, 3 minutes without air, 3 days without water, 3 weeks without food, although that last one is heavily depending on existing fat stores and will still likely have the latter days spent in a coma plus lasting damage to other tissues if/when they start being broken down under emergency conditions.

Atkins makes for a useful bit of info when arguing against topics where false claims are made about certain deaths.

Ju-Jitsu thing is a lived experience which details both human nature attempting to overcome a situation not fully understood as well as the physical limits that can be placed on the body. Also what it sounds like when a bodybuilder tears his own deltoid/trapezius because of not listening to someone who knows better.

tl;dr internet + probable undiagnosed autism + an IQ around 150