For a while I seem to be having 'flashbacks' just as I'm about to drift off to sleep. I'm not talking about some traumatic childhood experience, just vivid memory flashes of streets, objects or situations from the past- mundane objects like for example, a rusted mesh grill over a landing window, and the sun shining through it; I've also been remembering parts of dreams that I've had several years back.
It is a strange sensation, as I usually have a bit of a start, like a sudden realisation of something, then it's gone. I find it interesting because of how the mind is capable of storing all these things that we've encountered in life, and that it is possible we could remember every minutiae.

The Persistence of Memory, Salvador Dali 1931