Rusty Cage

I've been hearing on Pandora this Johnny Cash cover of Rusty Cage, a weird song whose short history seems to give no clue about it's deeper meaning. I'm guessing it's just a collection of macho toughman words strung together that's fun for anyone high on testosterone to sing along with. I'm interested if anyone has any ideas if this song is actually about something. Here it is with some repetition removed

You wired me awake
And hit me with a hand of broken nails
You tied my lead and pulled my chain
To watch my blood begin to boil

But I'm gonna break
I'm gonna break my
I'm gonna break my
rusty cage and run

Too cold to start a fire
I'm burning diesel,
burning dinosaur bones
I'll take the river down to still water
And ride a pack of dogs

Hits like a Phillips head Into my brain
It's gonna be too dark
To sleep again Cutting my teeth on bars
And rusty chains, I'm
gonna break my Rusty cage and run

When the forest burns
Along the road Like God's eyes In my headlights
When the dogs are looking
For their bones
And it's raining icepicks

On your steel shore