I think it might've happened for a few thousand years on our end. [ Jimmy laughs, nervously and a little hysterically. That was... a possibility Castiel had warned him about, but he hadn't quite realized how much a thousand years was. Good thing it didn't really happen! ]

Dreams? Oh, right. He did, yeah. I didn't see them but I think he told a few other people that he saw Lucifer destroy all of humanity.