We need to talk about the invisible deathtrap that is CO2 canisters

[Mouse]

I could be wrong but isn't this how CO2 affects people in reality? You don't really realise anything is wrong until you've already passed out, and then you stay passed out due to the density of the gas keeping it closer to the floor.

My understanding is that CO2 is one of the only asphyxiating gases that's actually noticeable, since CO2 is what triggers the suffocation response.

For what it's worth, last time I saw CO2 used no one coughed before passing out, so it's possible that's bugged.