"If it came right down to it."

I don't know if that's a Maine thing or if "If it came right down to it" exists as casually as we use I hear it used in this state. The phrase is, in my experience, most often used in the context as illustrated by these sentences**:

1) "I could kick that guy's ass if it came right down to it."

2) "I'd fuck that waitress if it came right down to it."

3) "I'd sell your soul for a bag of coke if it came right down to it."

What is being said is, while the proverbial "I" am not going to kick "that guy's ass," "fuck that waitress" or "sell your soul for a bag of coke," I feel so strongly about kicking said ass, fucking said waitress or selling said soul in exchange for cocaine, if a more surefire opportunity to accomplish any of the aforementioned goals were to present itself, I'd probably seize said opportunity. However, right now, while I am a stones throw away from having enough ambition to get from point a to point b with the goals outlines in sentences one, two and three, I'll settle for talking about how ideal my imaginary future seems if only things were different.

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**In this context it is rare to hear or see "If it came right down to it" used at the beginning of a sentence but I am sure it is done somewhere.