I have a story that I have told on here before:
When I was in my late teens (about 20 years ago), my best friend lived in an old farmhouse. All the occupants of the house were young like us and we were all great friends and had some brilliant parties. At the time the following event happened, only one of the upstairs rooms was occupied, by a chap... let's call him James.
My friend's bedroom was on the ground floor and had once been the dining room. It had one of those serving hatches between it and the kitchen and for some reason it never closed completely.
One morning, I was (I thought) alone in the house after my friend had left for work. I was sitting up in bed, thinking about getting up and going to work. My back was to the serving hatch.
All of a sudden, I heard someone stomping around in the kitchen behind me, opening and closing drawers noisily, banging cupboard doors and clashing pots around. I jumped out of my skin and thought angrily, "WTF is James up to in there?". I walked into the hallway towards the kitchen and the noises stopped. There was no way that anyone could have got through the corridor up the stairs in such a short time. Nothing seemed out of place (though, TBH, the house was never pristine, as you can imagine with just teenagers living there).
I ran upstairs and knocked on James' door - no answer.
I got my things and ran out of the house, leaving the front door unlocked behind me.
Anyway, we all stayed great mates over the years and about six or seven years ago, I was telling this story when one of my friends went
"No, you're getting it wrong - that's what happened to ME, remember?". It turned out that we'd both experienced exactly the same thing at different times.
Loads of other weird shit happened in that house. My friend had a visitor over from the USA and gave her his room to stay in (the one with the hatch). After the first night, she refused to sleep in there alone and bunked in with one of the other girls. She said she'd seen a figure looming over her bed in the night.