I think that there is a case for a pre-recorded announcement to explain to the passengers what is happening. Saying that there will be a rapid descent etc.
The cabin crew would then just have to "hit the tit" and it would reduce the "we're all doomed" anxiety perhaps.
A job well done, it would appear.
It would also appear that the passenger did not act in accordance with the safety instructions by attending to his son's mask before his own.
