I'm not a person for flights of fancy, I'm educated and pretty rational, but this experience I had as a child I still often think of and wonder how anyone could rationally explain it...
It would have happened around 1976, making me 6yrs old at the time, and really it was a pretty nasty and frightening experience.
The bedroom I slept in at the time was a large one and I shared it with my older brother. There were two beds in the room, a double one and a small single one, and the beds were place side by side.
One night I was asleep and woken by what felt like a slap in the face. Waking up immediately I could see there was no one there, but looking across to the other side of the room, to the other side of the bed that my brother was asleep in, I could see a large, luminous white hand pointing straight up and almost touching the ceiling, its palm outstretched, and just there unmoving.
Obviously I was terrified and cried out, my mother came into the room and turned the light on and it vanished.
I have no doubt in my mind I saw what I saw, and also felt the slap in the face, this was in no way my imagination, I was staring straight at this thing for a good half minute.
Also, much later on as an adult I finally told my brother about it, and he went as white as a sheet and said he'd seen it too. But neither of us know whether it was the same night.
Anyway make of this what you will.