The final song on Mercury Falling, the song is country-themed much like I’m So Happy I Can’t Stop Crying.

Sting:

A South American shaman told me that the human eye can’t filter yellow light, so the lithium in direct sunlight goes straight to the brain. Quite how he knew that lithium is a constituent element in sunlight I didn’t find out. He explained further that this was why it was good to watch the sun go down, to feel calm and at peace before nightfall and before the mercury falls again.

Source: Lyrics By Sting