Haha, now that I've slept on it (well, okay, this didn't get posted until after I'd slept on it, but whatever), I'm mainly struck by how much this adds to the biblical parallels. I want to write meta! Meta all about how everyone thought that if only they'd known of the supernatural all along they could have saved Mary, but it was actually Mary's knowledge that cursed her! She's so Eve to John's Adam! And with all the Dean and Sam parallels with Cain and Abel... !!!!!!!! And Mary sold her soul (or whatever) to save John, who sold his to save Dean, who sold his to save Sam... it's like an ENDLESS CHAIN OF SOUL-SELLING. Or, okay, maybe not endless, BUT STILL. I am having SO MANY thinky thoughts about it!