Was very tired lastnight out the farm (did two trips yesterday), I finished up after midnight.
Second-last trough while cleaning I had an interesting experience.
I’m acccustomed to blips in orientation at night when a lack of landmarks in the visual field, but this one was harder to fix.
I’d got out of the ute (engine running/lights on) knowing which way I was going and ute was pointing, cleaned down one side of trough, then over to otherside and looked at everything and it was backwards. The trough lid’s down the north end but my internal compass said for sure it’s down the south end. (I do often do the run the opposite direction, perhaps mostly).
Somehow my brain when I went around the trough to do the otherside kept something of the image-with-orientation from the previous side I did (it hung perhaps, persisted)
I couldn’t will it back to being right (I was in a hurry and didn’t have time to study the weirdness), but it righted itself I think when got back in the ute.
So to me it seems (in retrospect) that the moment I stepped over (or around) the trough to do the otherside I didn’t change my internal orientation (compass), hence something of the perspective was 180 degrees out (I guess). Though I sensed clearly there was a correspondence problem.
Wife just saying when she wakes in her dark bedroom at night sometimes gets this. I too notice it occasionally.