I know this can happen because it happened to me. I saw in a “dream” something that happened 3 weeks later to the specific person, in the place, and at the event I had seen. It involved a death. Fortunately the morning after the dream I told someone...otherwise, I would have ended up thinking I was imagining things and going crazy. This never happened again, for which I am greatful.
Joel 2:28
28And it shall come to pass afterward, that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions:
Me too, many years ago. It was like Deja Vu hit me, then 'wham' I remembered a 'dream' and knew the potential outcome.
I was with three other people in a car, I demanded we get the hell out of there NOW. It got to the point I threatened the driver to start the car and MOVE or else!
(we were parked on a dark country road in Wis making out)
It has happened to me as well.
I do believe this, but only because, a, it's happened to me several times, and b, so many people have claimed to have the experience. I figure they can't all be lying, although the only experiences I accept without any doubt are my own.
I'd rather not go into detail, but when I have a dream like that I do tell people and it does no good at all, except in one case he bought a lot of insurance he otherwise wouldn't have.