On a slightly deviant note
I attended the BA 1/2 day crash course (wrong name but ....) some years ago and realised then that these life jackets are both blessing and deadly menace.
We discussed the, at that time, recent water landing and drowning of pax in the cabin where 'pax' had inflated their vests before exiting. The water ingress had forced them to the ceiling.
I remain deeply sceptical that the life vests are fit for purpose in respect or early accidental release.
Imagine a sea of bodies with hands and arms failing near those little red toggles that dangle without any protection. One pull and that's it. The damn thing's inflated.
I got to pull the cord on one and, after the initial shock of the intense cold, I tried taking the bloody thing off after strapping it tightly to myself! Not easy. Not at all easy.
Lord help anyone needing this thing. I am sure it is necessary but not at all sure it is still fit for purpose. Will it take a court case to bring design rethinking to the humble life vest?