A friend took his 70-odd yr old mother to see it a few years back and as it was a matinee, it was total old-lady-land in the theatre.
My mate was v. cynical about it all beforehand and 'oh, mum'll like it, no doubt I'll be bored stupid'.
But when the scary bit happened (he wouldn't tell me what it was!), he was so scared/shocked/surprised he apparently jumped out of his seat exclaiming 'oh F*!' very loudly (in this theatre full of grannies). He sat there, cringing with embarrassment that he'd sworn like that in front of his mum and others and then the old lady on the other side of him turned to him, patted his arm and said 'oh dear, are you all right, son? It's only make believe, you know'....