Lyric discussion by CorgiKid 

it doesn't take a rocket scientist to see its about agent orange and how they would fly overhead and spray it on the Vietnamese.

And the thing about spines refers to courage!

@CorgiKid ...and how chemical weapons (particularly when deployed this way!) are rather cowardly.

@CorgiKid Hahaha they didn't spray it on the Vietnamese they sprayed it on their crops in obscene amounts. It's a herbicide.

@CorgiKid "I've got my spine" is probably on one level an ironic claim of courage, but undoubtedly it is also a reference to one of the ghastly effects of Agent Orange, a birth defect called spina bifida found in the children of people who were exposed to it.

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