A couple of points for all to bear in mind:
Nobody died (thankfully).
Most incidents of this kind fall into the category of there but for the grace of God go I.
I have a reasonable amount of experience of flying night helicopter rescue and when things start to go wrong, for whatever reason, the situation can rapidly become difficult to keep on top of. Whatever the initial cause of this incident, the pilot performed admirably in recovering from a difficult situation without loss of life. Bigger brains than mine will pick out the cause and hopefully whatever it was we will all learn something from it.