Here are two experiences, both when I was 11.
I had a sleepless night when I was nearing 12. The reason was because I had a few ghost stories. I went to bed and hoped my sister (who is younger than me) would stay awake but soon she was asleep. When I am scared what I do is cover myself under the duvet.
I heard something hit the floor. I tried to get the sleep but then I heard what seemed to be footsteps. It was coming towards my room very briskly. It was my Mum. I told her what had happened and she said, "Just go to sleep." Then she went out the room.
After a few minutes something hit the floor again. It was my sister's doll. My heart skipped a beat and my mind was screaming at me, "Go to sleep! Go to sleep! Don't look out of your duvet!", but I dared myself and opened a little space in my duvet to look out.
My eyes opened up. I saw a man in a cap. He was wearing a bandana. But he had RED eyes. I quickly hid under my duvet again. I picked up some courage and looked out again but there was nothing to be seen. I don't know how I got back to sleep but, eh. It hasn't happened a second time.
Since there wasn't enough letters in this post I'll share a different experience.
I was at home, doing the normal stuff. My family had gone somewhere and I was home alone. I turned on the TV and went upstairs to go on the computer. After about 20 minutes the TV suddenly turned off. I went downstairs to see if my family were there. They weren't.
I went upstairs, told my online friends that I'd come back in 30 minutes. I went on my PS when I suddenly heard a noise from upstairs. I turned on the light and looked upstairs. I turned away from the stairs when I became aware of a figure in the corner of my eye. At the top of the stairs was a girl dressed in plain white with black hair covering her face. I could not see what she looked like. I ran from the stairs and ran back again. She was no longer there. I then heard someone at the door. My family were back. I told them what had happened and they made jokes about it.
Comment what you think.