Ok i'll write 2 stories, take it or leave it but i will die and still believe this to be 100% true.
When i was young my parents would take us up to Cape Cod for summer vacation. They rented a little cottage house with 1 bedroom, a little kitchen and a living room with two sofa-beds. My brother and I slept the sofa beds, my parents in the bedroom, and my sister had a crib right besides the bedroom door. I was 8 and my brother 6 at this point. During the middle of the night i woke up and i saw like smoke shapes above my sisters crib. My memory is too foggy to tell you if they we're faces or recognizable shapes, but they we're "ghostly". So i wake up and am freaked out by this, i don't notice that my brother is up and he's also seeing this. The next morning i tell my parents and my brother instantly says that same thing. To this day we both still swear we saw something inexplicable that night.
Second story.
I was 15 or 16 and was sleeping at a friends house. I was in small guestroom in the basement. I wake up during the night and i see this dude standing next to the bed. He was all bright and shit, the best way i can describe it, is that if he was a Light Bright game template. If freaked me out and when i blinked, he disapeared.
In the morning i wake up and see a picture frame with a small asian dude posing with a child, who turned out to be my friend when he was young. In my mind, that was the guy i saw during that night. Unknowingly i asked my friend about the guy in the pic and he told me it was his uncle, who had died in that same room during his sleep, a couple of months before.
full serious.