[londons_explore]

Unless you take really deep breaths, I feel like this is just going to end up with a slight oxygen deficiency...

[peripitea]

Get a cheap pulse oximeter and try it yourself if you're curious. It will not cause your oxygen levels to change in any meaningful way barring some very serious health issues.

[__turbobrew__]

> Unless you take really deep breaths

That is the entire point

[hn_throw2025]

That’s how it works.