I have been reading many stories here and I decided to share mine too (sorry for any grammar mistakes, I am from Greece). It happened when I was a baby, I was 7 months old, so I know this story from my mum.
It was late, midnight, she and dad were sleeping when she had a "dream". She saw a very tall man with pointed chin and ears, kind of yellow and white skin, crooked nose and black shirt, trousers and cape. Everything in the room was like she left it, nothing was different.
He passed through the wall, went towards her and grabbed her from her arms and lifted her so that to be in a sitting position (because she was laying). He squeezed her arms stronger and he asked her in a strict way, "Do you love your child?" My mum answered with a question in her face because she didn't know what was going on, "Yes, I love her." He got really angry, and looked up, screaming weirdly, then stared at her again and squeezed her arms more, shook her and asked her again with a scream, "DO YOU LOVE YOUR CHILD?" My mum got angry too and without fear she answered, "YES, I LOVE HER". He, again, looked up and screamed like an animal, shook her stronger and told really loud this time, "I'M ASKING YOU AGAIN, DO YOU LOVE YOUR CHILD?"
At that point she got a bit scared and she was in pain too from the squeezing and looked at dad to see if he is aware of what was happening, but he was not. And she turns again to this man and told in an angry and determined way, "YES, I LOVE HER. I TOLD YOU MANY TIMES. WHAT DO YOU WANT NOW?" He squeezed her arms more and shook her while he was screaming and left her alone and disappeared through the wall from where he came.
She doesn't remember opening her eyes, like she was waking up from a dream. She found herself sitting and looking to the wall from where he disappeared. Her arms were in much pain at the place he was holding her. It was like she wasn't sleeping in the first place.
The same day, at 3pm, I started to shake really violently. I was moving my hands and legs too, like someone was doing this to me and my eyes were pretty open, staring at thin air. Mum tried to hold me but she couldn't make it. After 2 minutes I stopped and smiled with a peaceful face and started to baby talk. They took me directly to hospital and had tests (blood, MRI etc). They didn't find anything, doctors told I was completely healthy.
Mum combined this shaking thing I had with the "dream" she saw and wondered if she said, "No, I don't love her", what would have happened? For 10 days she couldn't touch her arms due to the pain she was feeling.
I want to refer, shortly, to a similar event too. My grandma (dad's mother) saw in her dream a man telling her, "Tell me a person in your family that you want to die." She told, "What do you mean, why? Someone has to die?" and he answered, "Yes, pick one." Grandma told "My youngest child" (he was 4 years old). The same morning the kid fell in the river and drowned. She is telling still why to answer like that. She could have fought.
Generally many things happened to my family and my house. Especially to my mum. These are two of them.