I've got a few, but a couple quick ones...
When I was in the 4th grade, I didn't know that my maternal grandfather, who I was very close to, was ill and dying from leukemia. Never even knew he had gone into a hospital down the block from his apartment in the Bronx. One day, getting ready to leave for school, the phone rang, I looked at my mother before she picked up the phone and said "grandpa's dead". It was my grandmother calling from the hospital to tell us.
When I was a senior in high school, I was walking home with a buddy of mine and passing the junior high my sister had just started at. I looked at the building as if I could see the classrooms within, (this was a big school), turned to my friend and said, "My sister's not in there, something's wrong". My buddy asked me how I knew, and I just said "I know, I can feel that she's not in there".
Ran home about a mile, up the stairs to our apartment and yelled to my mother..."Where's Linda?" My mother said how did you know? Know what, I asked. She had been hit by a car on the way to school that morning, but only knocked back to the curb and bruised up...not needing hospitalization.
Nobody at my high school knew my sister, or told me anything about the event.
Don't know how. Don't know why. But that's what happened.
I've got others, but for another time...
It's a big strange world we live in. We've only scratched the surface.
Along those lines:
When I was younger, my family had planned a trip to Singapore. I was of course, pretty excited about it. One of the things/sights we knew we would be going to was a smaller island called Sentosa Island just off the main island of Singapore.
There were 2 main ways of getting to Sentosa Island; a cable car, or the ferry. The plan was to take the cable car.
About 2-3 weeks before the trip, I woke up soaked in sweat from a nightmare. In the nightmare, we were in one of the cable cars headed for Sentosa Island, when the cable suddenly shook HARD. I saw one of the cable cars get knocked off the line, and the next thing I knew, our cable car was falling towards the ocean 100+ feet below. I remembered the screams, but woke up just before the impact. The dream was SO vivid.
That morning my mom noticed that I seemed really upset, so I ended up telling her about my dream. At the time, the memory was so vivid, I even recalled the colors of the cable cars (the color of the one we were in, that fell, as well as the color of the other one that I saw fall in the dream, and told those details to my mom. The cable cars were painted different, solid bright colors; red, yellow, blue, green etc.).
My mom comforted me and assured me that it was just a dream/nightmare, and I eventually forgot about it... until we were headed to Sentosa Island on the trip. The closer we got to the cable car station, the worse my anxiety and the feeling of dread grew.
As we waited in line, I noted that the cable cars looked exactly as they did in my dream, and they were painted in the bright colors, just as in my dream. I had broken out in a cold sweat by then.
As we got to the front of the line, the next car that pulled up, was the color of the car we'd gotten into in that dream. I grabbed my mom's arm, and whispered fiercely, "NO! Remember that dream I told you about? That's the color of the one we got into!".
She could see that I was visibly distraught, so she apologized to the line attendant and asked him to board the people behind us as we stepped to the side.
My dad, who I'd never mentioned the nightmare to, as he was the more 'practical minded' type, went, "What's going on? We've been waiting in this damned line. What are we waiting for now?". My mom, knowing my dad well, simply replied, "I'll explain later".
She then waited for the next cable car, and asked me, "What about this one?". The 2nd car that pulled up was the color of the first cable car that had fallen in my nightmare, and I shook my head.
When the 3rd car pulled up, she asked again, "How about this one. Was this one of the 'bad' colors?". I shook my head, and she asked, "Do you think it'll be OK to get on it?", and although my anxiety was still high, I said, "Yeah, I think so".
The whole ride across, I had a death grip on the handrail inside the cable car, but we made it across without incident. My anxiety came back a little when waiting for the ride back from the island, but the cable car that pulled up as we got to the front of the line wasn't one of the 'bad' colors in my nightmare. Nothing happened at all. When my mom eventually told my dad about my nightmare, he just rolled his eyes and harrumphed.
~6 months after the trip, the news happened to be on TV and I suddenly yelled, "MOOOOOOOOOOOM!!!!". The news was reporting a story about a cable car disaster in Singapore.
Apparently, a ship with a tall derrick had been mistakenly allowed into the channel between Singapore and Sentosa Island during high tide. The derrick had struck the cables and knocked 2 cable cars off the cable. The occupants were killed. The cable cars were the same 2 colors as in my nightmare (it's been a long time, and I don't recall the actual colors anymore, but that news report freaked me out).