That made sense in my head. Oh, screw it.
In any event, Frankendoc awakens some time later to find himself lashed to one of his own operating slabs, and long story short, he pleads to be set free, offering to interpret the immortality formula for Our Intrepid Heroes if they'll just let him go. Sam, still convinced his plan could work, draws Dean aside for a consult, but Dean's adamant: He'd rather face Hell than survive as a monster, so Frankendoc's got to go. And with that, he pinches a chloroformed cloth over Frankendoc's nose and mouth, and Frankendoc passes out one last time.
Even later, Frankendoc comes to and manages to light a couple of matches, thereby illuminating the interior of his tomb, which happens to be an abandoned refrigerator Our Intrepid Heroes found somewhere out there in the woods. They've wrapped the fridge in chains, and the thing now rests at the bottom of a very deep hole they've dug, with Frankendoc's personal journal rather pointedly sitting on top of it. As Doc Benton screams and hammers his fists against the lid and screams and hammers his fists against the lid and screams and hammers his fists against the lid some more, a determined Dean and a still-reluctant Sam start shoveling dirt on top of him, and I'm sure I'd be more impressed with this development had I not seen this plot device used at least three other times this season. But let's not be churlish, for it means the end of Billy Drago's reign of terror and overacting on Supernatural, does it not? "It does!" Excellent. "Hooray!"