Last night I dreamed I was calibrating a ventilator in a library

I'm in this huge quiet library, only instead of books the shelves hold anesthesia machines, and I'm going from one to the next checking the alarms, all of them set to the softest possible hum. No patients anywhere, which should have felt wrong, but it didn't — it felt like the whole room was just waiting, breathing on its own. I woke up before I finished.