You then argued that breathing increased levels of CO2 will trigger survival instincts. This is also true, and exactly what grandparent said.

or you're just projecting your own character on someone you don't know?

Wouldn't that wake them up?

I also assumed that too much CO2 fast is the key not the super slow version of what those people in the sub have experienced

OP, correctly, pointed out that we don't detect the lack of O2, we detect a buildup of CO2 (because it causes respiratory acidosis). If the CO2 is removed, there's nothing to cause the panic response, the situation itself notwithstanding.

It's still nea that it works with an impaired amygdala, though.

why do i have to argue here with so many people about something so simple to understand?