Not only that but your neural networks are chattering away all the time even where there is no stimulus. It's what neurons do when they're at home. So when 'nothing' is happening, the low-level neural chatter comes into consciousness. ie the Noise becomes Signal.
One can study this effect by lying in a bath of body temperature water in a totally black bathroom when noone else is in the house. It is not the isolation tank of Dr John Lilley or Michael Jacksob, but it will be effectively spooky. You can't be me, I'm taken
Always check you've put your light bulbs in properly or it will come back to haunt you Life should consist in at least fifty percent pure waste of time, and the rest doing what you please.