I've had similar experiences, especially when sleepy. The interesting thing is that, at least in my case, it's often difficult to remember the subjective experience of it--once the correction kicks in, the earlier rationalizations seem to be subject to the same fading effect that makes dreams tough to remember, especially when I haven't acted on the original confusion (as you did by turning on the lights).

Also, this is why it's probably reasonable for all of us to be confident that our left arms are not, in fact, paralyzed--because we have evidence of the anti-confabulation systems in our brain working as intended (if a bit slow to catch up, on occasion).