Shadow people always at the edge of your sight? Happens more often than you'd think. But I don't know if it's anything paranormal related or just something odd with the eyes or brain doing that.
Fun fact though: your retina at your periphery vision is more sensitive than at dead center. Your center retina wears out faster in life than at the periphery edges so you can sometimes see things at the edge of vision better than by looking directly at them. Try looking at a starry night sky and you'll usually see more stars at the periphery of your vision. Too bad the lens of the eye can't focus on the periphery though. It's probably also an evolutionary trait too for detecting motion at the edge of sight.
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