In this dream I was trying to play a game with my sister outside, but we had to keep moving out of the way because trains kept coming through the area (in real life the area is residential, near a daycare and tennis court, with no train tracks. Only the train tracks were there in the dream). Finally my sister gave up and left, and I took the train to run an errand. The trip there was fine but on the way back the driver kept closing the door in my face. I held out my hand thinking it would be like an elevator door but I got my hand smashed (I was not injured). I had no choice but to climb on the roof of the train to get back, hoping no one noticed and that I did not fall off. A few people were up there already.