Why do people always say “they turned around and said…” in conversation?

Posted by Joshieeeeeeee@reddit | AskUK | View on Reddit | 61 comments

I hope this makes sense, I’m also a Brit but the amount of times someone will be telling me a story and they’ll say something along the line of “he turned around and said …” even in a seemingly 1 to 1 conversation where there’s no turning or even left field comments?

I’m not sure if it’s meant to imply that the following statement is unusual or unexpected, but even so, it’s such a strange idiom, I tried to google but couldn’t really find much on it, anyone any ideas?