'First-night effect' sees brain staying alert

[Windy]

http://www.unexplained-mysteries.com/new...ying-alert

Scientists have found that half your brain stays alert when you try to sleep in unfamiliar surroundings.

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thanks Windy-
Awesome contribution to this site.
I heard that called
'Tracking'
and it is also associated with intentional dreaming like a trance state, in twilight or
hypnogue fugues, or out of body states that allow the tracking.
Contributes to lucidity and consciousness of layers within the dream.
Reminds me of the movie, "Inception".
We do that here.