When I get out of bed at night, the mind is quite nuts because it is on auto-pilot, and stuck in an in-between dream and awakening state, and the autonomic nervous system is what is working, in it's automatic way, but I get nervous that maybe some demons crawled into my ears while I was asleep, so I begin to meditate, and that calms me, but I shouldn't be afraid of that lizard mind because it could well be illuminating.