Is it normal that i have flicking of closed eyed random pictures at night?

I see each flicking of photo at like 10 % opacity but in a way that is almost totally clear what I see, and it involves seeing a series of creepy faces involving laughing and sadistic grinning and all of them involve real life people or is themed of what actually exists in the real world, and viewing them from a perspective you're laying on a floor and looking at them upwards.