I must have always been psychic because I can remember seeing "shadow" people on the wall of my bedroom when I was little. I used to sleep with my head under the covers to hide from them and I still do so over 30 years later. The psychic stuff stopped for a long time, because I guess my fear must have repressed it. However it re-emerged again after I met my husband, whose family (or at least his mum) considers it as something "normal" and nothing to worry about.
This particular experience happened when I was about 20 and still lived at home with my parents. My bedroom was built into the loft of the house and there was a tiny "corridor" between my bedroom door and the loft door, which tended to be a bit dark.
One night I was sitting on my bed reading when something made me look up. The door to my bedroom was shut. There in the dark corner by the loft stood my parents' next door neighbour, who we called Uncle Harry. He looked straight at me and was completely transparent. The experience wasn't threatening, but the problem was that he'd died when I was about 14! Needless to say, I ran out of that room pretty quickly! He never appeared again, but after that whenever I sat in my room on my own I would leave the hallway light on and the door open!
Young children are natural psychics. I believe it is something we are born to and we can not change that. What we can, and often, do is block out what we can for various reasons (mine was because my families belief in "if you ca not see it, it does not exist" with the exception of the Higher Power). I do not know when the magical age of cessation is, or even if there is one. Some people go their whole lives able to see both sides, so to speak.
I think Uncle Harry just wanted to say hello and that he was fine over there on the Other Side. I do not think he meant to scare you, he may not even been aware that you could see him until you went running out of the room. 😊Thank you.