Promise flings her hands over her head. This is not good for her hands, but it keeps her conscious until there's enough of a gap in the wall to slip through. She needs to get into open air or she won't be able to command Ruin when it finds that it can't destroy her. She knows the place, if at a bit of a remove and in a less collapsing state. Out she goes. She's allowed to fly, so she flies.