AU: I'd probably say this takes place somewhere diverting from the storyline at Season 4 or 5, after Jimmy is abandoned once before by Castiel, but before he assumes the position of God and gets tangled up in the mess with the Leviathans.
Rated T for language in future chapters.
(Lawrence, Kansas)
Jimmy would have been overjoyed to discover he had free will again upon waking up, except for the fact that he felt unbelievably worn out. Going about with an angel behind the wheel wasn't exactly the joyride he had been hoping for when he had first given Castiel his consent. He felt like a limp noodle. He just didn't want to move. The only thing that compelled him to rise was an insatiable hunger churning in his stomach. But even rising wasn't easy. He felt like his insides were made of lead. Upon looking around, the religious man had no idea where he was. Sure, he had been conscious for bits of Castiel's journey, but mostly he had been suppressed in a comatose state. Forced slumber was the most restless of all.
Jimmy rubbed his face pensively. His stubble had gotten thicker. He was due for a shave pretty soon. And he felt uncomfortably unclean. He needed a shower too. But food first. Definitely food first. It was literally a matter of life or death.
He didn't have any idea why Castiel would suddenly abandon him, but his primary concern was getting some grub. Castiel had been generous(?) enough to abandon him privately, instead of making it a public event. Unless Castiel had been forcefully plucked from him. Jimmy stepped awkwardly out of the damp alley that he had woken up in and looked around looking obviously lost. His eyes spotted a diner across the street, down the road a little bit. The neon sign alone harmonized paradise. Jimmy soon discovered two things, however. One, it was unbearably hot out. Two, he didn't have any money. After having pat himself down, he shed his beige overcoat. His rubbed his upset stomach to soothe the ache. Either he'd have to steal, or eat food out of the trash. Neither of those options were very appealing, but he had to do something.
He spotted a stand nearby bearing fresh fruit. He lapped his coat over his left arm and headed down the street. His heart was beginning to skip a little. He was really going to do this. He had never stolen anything before in his life, so this was a first. The stand was coming up on his left side, and Jimmy discreetly eyed an apple. He had to be precise and swift. He stepped closer to the stand while maintaining his pace, and it seemed that God was on his side because at that moment, the stand owner had turned his back. Jimmy fished out the apple and with a movement of his arm, the coat slid down over his hand to hide the goods. He never stopped walking and he didn't look back. Only when he felt he was a safe distance did Jimmy tear into that apple like a starved beast. He didn't care about the stickiness on his face or the bits of skin that got between his teeth. That apple was the sweetest thing he had tasted in a long time. It was only when he finished the apple that he saw the irony in his situation. He remembered Adam and Eve.