Thank goodness for that, I thought I was going mad.
Tr loses authority for an as yet unexplained reason (but don't mention the S word, and porobably not engine failure), small, thin walled drive shaft does not take kindly to fenestroN (why do they spell it with a capital N?) rotating in treacle rather than air decides to give a Gallic shrug and go on protest (typically Froggish) and poor unsuspecting pilot who now thinks his fenestroN Stall (oops sorry) has stopped retrieves a/c back into hover only to have Newton 3 demonstrated to him in a practical and vivid manner.
Sorted. Back to the tea and biscuits.
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Another day in paradise