I'd never go to sleep with AirPods in intentionally.

I had a scare in the very early days of owning AirPod Pros accidentally falling asleep with them, and waking up with tinnitus that took hours to go away.

Since then with every gen I've occasionally had ANC malfunction when they come in contact with a pillow and make some deafening noises, I wouldn't be surprised if that day they had been making some horrible shrieking noise while I slept.

(in fact, as if to mock me, I left this comment unsent realizing I didn't care enough to finish it, until my AirPod Maxes decided to flashbang me for having the audacity to while lying on my back. people need to know these things are treacherous in bed)