I interpreted it to refer to the sort of momentary lapse in mental coherence that might occur as you fall asleep. You're listing all this stuff you're saying "g

I interpreted it to refer to the sort of momentary lapse in mental coherence that might occur as you fall asleep. You're listing all this stuff you're saying "goodnight" to and then your mind blanks for a second- no one else is in the room with you in that moment. After a moment you remember the mush and the old lady saying "hush".