Dream About Sister And Stranger In Road Hitting By Car

I was at my apartment building and was hanging out with my sister and this stranger in a road. There was cars flying by but the strangers like fine will stop them ourselves stood in front of the stop sign and a car went flying hitting her I was in shock seen her on the ground said gabby go get mom and call 911 now hurry. I went down. Checked on the stranger made sure they were breathing and was like alright keep on talking to me now