I'm not sure if there's already a thread for these, couldn't easily find one by searching.
Anyway, I've been reading Julie Walters' 2008 autobiography, 'That's Another Story' and on pp61-63 she recounts a very peculiar poltergeist experience when she was about 12. Having moved bedrooms, one night the light kept switching itself on, stopping only when she - rather bravely, I thought - told it to 'stop it'. In the morning, on the bedroom floor was a scrap of paper on which her by then deceased grandmother had written her name several times some years before as part of a game the two had been playing. This scrap had, perhaps, been treasured by her senile granny and kept locked in a trunk of her possessions that stood outside the door of Julie's new bedroom.
It's rather typical in its inconsequential nature, and she doesn't make anything more of it than a straight recounting of her memory of the event.
Are there many other such autobiographical accounts of the supernatural from people who might perhaps have an eye on public perceptions of them and perhaps be a bit wary of discussing such things? I recall Alec Guinness having a few such tales including his premonition of James Dean's death, but not all that many others.