[xoxoxoBruce]

It looks like there's still "stuff" on the first floor. Since the tornado pulls most of the house up and away rather than collapsing it, you might survive flat on the floor away from flying debris. I say might because I've seen plenty of pictures of bare slabs in the aftermath. I have read if you lay flat under your car (if it's high enough), you probably won't get picked up even if the car is.