I would bet this is an oh overly active survival instinct. I feel like people describe this if I'm awoken by an unknown noise in the house. Often i don't even know what awoke me, but I usually feel a mixture of vivid paranoia coming on mixed with the calm feeling the game of archival is on. I call it the silent killer mode and i imagine that's how cats feel on a hunt. Usually goes away after listening for a few minutes and trying to chill. Sometimes I have to check the house to make it go away.

There is a variation since i have kids that feels like its too silent in the house and something is terribly wrong with one of the kids. I have to check all three are breathing normally before it goes away.