Sleep is more than just a great equalizer for the brain to gather all incoherent thoughts into a line and create coherence; sleep is also the guardian of the gate to the unwanted and unnerved thoughts that are safeguarded during the day. So when sleep is weak, it gives way to all kinds of craziness being free. The results? Something incoherent for sure, but also may contain that old nuggets of looking into someone's brain all curtains risen.