Okay, I believe most of us have looked at the clouds and seen images. I remember watching Hey Arnold as a kid and seeing each one of the kids watching the clouds each one saw a different image. One of them saw a Popsicle. Well I think it is your subconscious mind making the images( each one sees a different thing). I've read bits on this though I can't remember exactly where this makes the most sense. Now, has anyone ever noticed looking in the dark at night, the colors, the apparitions, fluttering kind of lights, and images? same concept here too, your subconscious mind is projecting images into the dark. This same concept goes into black mirrors. Now I am open to the idea that a black mirror opens you up to other dimensions. Though I think at least in part this subconscious projection comes into play. I think looking at clouds, the dark, or black mirrors are very good ways to get inside your own mind, interpret what it means to *you, better understand, and grow your inner self.
i'd think the intention of looking into a black mirror is different from casually getting dreamy with clouds . just believing in a black mirror opening to another dimension engages mind projection . i believe in clouds for good reasons . nature is kind and has wild realities to give you beyond the stories you've ever heard .
you know those little flashes that happen when you rub your eyes hard enough? they're called phosphenes, and they're constantly happening. when you look into a black mirror, your mind does the same thing to the phosphenes as it does to the clouds, only, since the phosphenes are much more fluid, it encourages the subconscious to find a more stable (and, theoretically, more real) scene to project stochastically into the chaos. just remember, your subconscious knows everything you now know, everything you've forgotten, and then some.