A moment ago, Jon was asleep with his head on his desk, which was doing his spine no good at all. The cat's yowl and the sudden lack of his uncomfortable chair co-conspire to make him try to jerk upright, which introduces his head sharply to the roof of the narrow duct. He swears, voice hard, and clutches his head, staring in confusion at the cat, and the space around them.

"... What?" is not asked specifically of the cat, because of course, cats don't speak. No matter what he thought he heard right before he was awake.