Here's the only thing I can contribute. Not really scary but a little odd.
When I was almost 15, in 1980, my Grandfather spent the night with us for Halloween so he could enjoy visiting with us and see the trick-or-treaters. I stayed up late that night after everyone else had gone to bed. I was building an airplane model and listening to the radio.
Around 2:00 or 3:00 AM, I finally decided to go to bed. Much earlier, my grandfather had gone to sleep in my bed; my brother's bed (in the same room) was empty. I don't recall where my brother was that night, I guess he was at a sleepover or something.
So, anyhow, I decided to go to bed. I opened the door to my room and was able to see my grandfather lying in my bed because there was a slight light from the streetlight coming in beside and under the windowshade. For some reason, I watched my grandfather for a number of seconds. I saw he wasn't breathing and alerted my parents. My grandfather died that night in my bed.
So, soon (the next night or so, I don't recall), I was in my bed attempting to go to sleep. I was lying on my stomach and just drifting off to sleep when I felt a sensation beginning with my feet and traveling up my legs. It felt like someone was laying a heavy (but not burdensome) blanket on me.
It felt odd, so I shifted position, but the sensation began again. This time, I sat up, looked around, gathered my senses, and laid back down to sleep. Again, the feeling began traveling up my legs and made it to my knees. I jumped out of bed and looked at the covers to see what I could see. Nothing unusual.
So, I laid back down, on my stomach, and within a few minutes it began again. This time, I decided not to do anything. The sensation of a blanket being laid on me began at my feet and began moving up. Over the course of a minute, it moved all the way up past my head.
I never saw anything and I never felt anything after that. I wasn't really afraid, I just thought it was odd.
Who knows what it was. I like to think it was my Grandfather somehow "tucking me in".
I do remember my brother wondering why I was the only one who never cried about my Grandfather's death. I was certainly said, but I never got too upset. Don't know why. Maybe I felt like he said goodbye to me.