Thanks, Happy Potter, for that but I still can't hear the reversers. It might be a combination of poor audio quality and the crap speakers on this laptop. Whatever - the issue isn't that important, not intended to distract from the other issues or the sterling work of the crew.
And thanks for that info, Capt Kremin. Hand flying decompression events is not something we practise very often - so it just reinforces my admiration of BW.