I am not sure if this is a case of paranormal activity or if it was a premonition that came to me at night but I'll tell the story and let you guys decide what it might have been a case of:
I was young, around 5 or 6, I believe. This involves my great-grandfather (my step-dad's grandfather) who I only met twice. The first time was when he was very old and frail but still functional, albeit confined to a wheelchair by this point, and the second time was when he was pretty much on his death bed.
One night, as I was sleeping, I felt someone sitting on my bed. My mom would occasionally sit on my bed while checking in on me so I thought she was the one who caused the shift of the mattress. I do believe I woke up but it just might've been a part of the vision/dream/whatever it was only to see an older man sitting where I thought my mom would be. Even though I only saw my great-grandfather twice I knew it was him, recognizing him despite how he looked quite a bit younger. Still an old man but not the frail man I remembered him to be. He looked at me with this sadness to his expression while telling me he was sorry he would not get to see me grow up to become the beautiful woman he knew I'd become and he said his goodbyes. He then rose from the bed, again causing it to shift. He then walked out of the room but went through the door that was closed and I fell back asleep.
The next morning my dad got a call from my grandpa, letting him know that Great-Grandfather Dewey had passed away in his sleep.