Lucid Time!

I can't remember many of the details, but I know that my family was there. We were on-board some train with unusually large space inside the train cars. My dad was doing something with alot of baggage that she had brought on-board.
Then me and my mother climbed up onto the roof of the train and saw another train coming the other way. We started to run to the back end of the train hoping to avoid the wreck, but somehow the trains never collided. I think they were on two separate rails.