Sometimes I dream and weird things happen. It was the week of Thanksgiving and I was visiting some family and my best friend in Virginia. She had planed a campout in her backyard with a campfire and everything, and told me that she had invited some of her friends to hang out.
We had just finished setting up the the cooking supplies when one of her co-workers showed up. I couldn't help staring at him. I could swear I knew him from somewhere, and I told my friend that. Throughout the next couple of hours I tried to place where I recognized him from, then he started telling a funny story. Right in the middle of his tale, I realized I knew the story he was telling but not because I was there, but because I dreamt it. Not his experience, but the campout.
I stopped him and told him the rest of the story. When I finished talking I looked up at him and he looked freaked out, like I was some kind of ghost or something. That's when my best friend said "Holy crap you weren't kidding when you said you knew him from somewhere. You had a dream didn't you?" And that's when I told them about my dream. He got over the initial shock and laughed about it later. So I didn't feel all that weird about the whole experience.