Dream About Underground Car Parking Lot

My sister and I were at some car place that she really wanted to go to. It was in a basement. And it was very huge. It was a car underground parking lot. You could register your car and park it and huge robot would take it and put it somewhere in the basement. The car would be on a floating square metal surface. When we walked in, cars were flying over our heads on metal surfaces. It was kind of scary and intimidating because there were so many. To me it seemed dangerous and I was scared of getting hit but my sister just seemed to enjoy it. She found it so cool. It seemed like it was her biggest dream come true. And she seemed to know how the system worked too. She explained it to me. We then went upstairs and ended on a metal surface amongst many other, that had several cars on it. She was standing on a different platform tho, one that didn’t have cars and was more safe to watch from. I was on one of the platforms that had cars. The cars were being thrown around and I almost got hit by one but quickly dug. I was terrified but my sister just thought it was cool. I seemed like the only one that thought I would die.