Our bodies respond and react to the amount of light and dark around it. A clear proof for this statement (and one that could make for some very cool footage/artistry) is the eye.
Seeing a pupil adapt to light and dark could be a very interesting thing to include in the episode.
In the resource I credited a record I released earlier that shows to a small degree what I mean. Enjoy.
Created: Apr 18, 2014micahmilton2 Document Media