I’m apparently both the shirtless guy (Gentoo) and the arch user. But I’m also the Kali user and Windows guy occasionally. It probably averages out.

You’re thinking of CO, increased CO2 in the blood (which when dissolved becomes CO3+) causes increased anxiety and too much triggers suffocation panic. That’s why you can breathe in basically any other gas and just shut down calmly, but CO2 will have you scrambling.