Dream About Being In A Big Building Looking For The Exit

I was in a really big building that kinda looked like a museum, and I was looking for the exit. I had a backpack on.I was walking around everywhere looking for the way out. I then came across my friend, Vivian, and she knew where the exit was. There was a time skip and I was right in front of the exit. We walked out together and there was a group of people. Everyone had a backpack on, but we weren’t on a school trip or anything. We went to the group and stood there. There was a boy who was grabbing people’s backpacks. I think he had a gun, but I’m not too sure. He was robbing everyone he could get a hold of. Me and Vivian were hiding behind the other people in order to not be robbed. Another time skip happened and we were with a group the was just on the other side of the trail. We were hiding behind their group. Something weird about this is that we were all really calm, including me and Vivian.