I’m very new to spirits, paranormal... I had such a frightening thing happen to me just yesterday, this is the first time I’m sharing. I was waking in a nearby park, it was just starting to get dark. I had an odd feeling like the air felt thin, I heard a footstep behind me, no one was there , however about 30 ft away I saw something that appeared to be a very dark outline of something peering at me behind a tree, I tried to dismiss it, but this dark shadow seemed to be following me, looking at me from behind different trees, I was staring to panic, but I had to check it out- I walked back to the tree walking all around the tree, but it seemed to move with me to remain hidden behind the tree, I’ve never been so terrified, I took off running all the way home, not wanting to look behind me. Can someone tell me what this means, why did it pick me? I haven’t slept since it happened.