Picture a long collapsed hallway the width of your shoulders.Rock edges sharp as broken teeth.Dust choking you.No space to breathe or turn. Now: You thread in a folded tube.You pump it.It blooms. And suddenly the path is: • smooth• safe• breathable• pressure-distributed• wide enough for rescue• stable enough not to shred somebody alive That’s all.A safe tunnel you can deploy like rolling out a carpet in hell.