Mommy, what is he doing?

[Sirius]

I think it was apnea. I usually don't sleep on my back. I think we're usually sleep paralyzed so we don't kick the wife when imagining running in a dream, for example, but when sleep is interrupted and it is still in place it is horrible terrifying and the mind flips out.

Perhaps.  This was some strange stuff, tried capturing it in story form, but terrible writer.