Dream About 911 Survival And Falling

I had a nightmare and the last event in that nightmare was me being a part of 9/11. Not completely the same buildings but something like it. I was in the very top and they were then ripped apart. Very tall, falling to the ground in seconds. I fell through and somehow managed to land in a lake, so I didn’t die but was about to splatter on the ground next to the lake. I’m not sure what this means. I think I was the only survivor yet there were only three others. I think one of the others might have been might ex-crush. I’m not sure what this means in the dream.