Lyric discussion by ragingglory 

"The harmonicas play the skeleton keys and the rain"

Since is the conclusion to the song I am feeling it is an image of the entire song wrapped into one phrase. The harmonicas representing himself, the skeleton keys representing the accessibility to the Louise figure directly relating to the ghost of 'lectricity howls in the bones of her face, and the rain of course, which Louise is daring him to defy but can't, and all that's left is the elusive Johanna.

Jewel and binoculars hang from the head of the mule. The mule is the drug delivery guy, he'e wearing binoculars for scoping out his destinations and his jewels are bling.

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