smoke in cabin
In-cabin video on TV this am shows a whole lot more acrid(?) smoke than I'd want to be breathing anytime anywhere for any reason.
The if the "oxygen" from the masks has higher O2 than the cabin air, then I'd be breathing less smoke to get life sustaining O2.
Is there a way to open anything to ambient for a fast air exchange if the aircraft is at a low enough altitude that pressurization is not required?