I want to start off by noting that I'm not sure if anyone else experiences this "phenomenon", if one could even call it that.
I'm curious as to whether there is a technical term to describe what I've termed "passive recollection". Essentially, throughout the day, I will randomly recall very vivid and specific details from my past, such as:
a line or scene from a movie
a particular scene from a book that I visualized in my mind
a particular scene, encounter, or experience from a video game I played
a line or quote from a video I watched
stray lyrics from songs I haven't fully listened to in years; sometimes just tunes
experiences in my personal life, like conversations I've had with people or things I've heard/seen
To elaborate on this, since what I describe may seem exaggerated, it's not as though I fall into some supernatural "trance" and suddenly experience a flood of old memories. Rather, I'll randomly recall these things throughout the day. I'd like to emphasize that it's passive. In other words, I don't consciously try to recall these memories—they just come to me during the day when I'm working, studying, or doing anything, really.
Again, I'm not sure if there really is single term to describe this, and if not, that's fine. I think if there is a term for it, it'll somehow be related to having strong visual memory, as, to my surprise, I can very vividly recall these scenes just as they happened.
I'd love to know either way. The best I can come up with is, as I mentioned, "passive recollection", though this seems to have some sort of religious connection, according to my Google searches.