You'd gone away to a work conference with a group of colleagues. One of them, G, is a bit quieter than the rest of you, has some visible disabilities and medical issues which she never discusses, and is socially rather awkward but is nevertheless a likeable and interesting girl: and good at her job.
After your presentation, G disappears rather abruptly. You find her half an hour later, and she's behaving rather strangely and finding it difficult to talk. You help G back to her hotel, make her a cup of tea and Gs fine again.
On G final morning of the conference, G says that she cannot go into certain rooms in the conference centre because she worries that details of her intimate relationship will be broadcast over the tannoy. You sit next to her on the train home - where she tells you some very strange things - and give her a lift back from the station to make sure that she's safe back with her DP.
G is now home and safe but worrying about your response to what probably amounted to a psychotic episode - she has had them in the past and knows how to manage them fairly well. What could or should G do to reassure you and other colleagues that she doesn't normally behave like this and shouldn't be reported to line management or HR? Should G ring or text you all to explain what happened and to apologise? Or should G do nothing in the hope that you won't have dwelt too much on what happened and that you're essentially a kind person who wouldn't want to do anything to threaten G's career? What should G do?
(I am G. I have NCed and changed a few details, so you may be my colleague.)