You sold a job that you couldn't do anymore to a guy who can't get financing from anyone else and you have to take the job back if he flops - which, according to you, is very possible. Tell me again how smart you are.
And what's with this "crawling back" thing that you're getting stiff over? Left a position (mainly due to my boss) for a better one at another company, then left that one for yet a better one back with FedEx. People with options can do that. Think about that tonight when you're losing sleep over whether the chump you tried to screw will be able to pay you back.
From Ops Manager to better job and back to Ops Manager. Yep, you're really making the moves, but I kind of doubt your story.
Here's the probable real one:
1. You fool some company into thinking you have merit and meaningful experience.
2. You're there for a week, and they are realizing that you were a terrible hire, totally incompetent, and absolutely, positively unfit for the position.
3. FedEx, always desperate for anyone to be a manager, takes you back and tells you that you're "special".
An "option" of going back to FedEx isn't really worth more than a piece of used toilet paper.