Castiel:... alive? That's a good question. How did these two [indicating Sam and Dean] end up on that airplane? Another good question, because the angels didn't do it. I think we both know the answer, don't we?
K: "But how?! You were supposed to be deeeeeeead!" Nabeshin: "I was, but Kumi-Kumi fixed me up with her needles!" Kumi-Kumi: "I'm an acupuncturist!" K: "BUT SHE WAS DEAD TOO!"
Shinra: You had two bullets in your body, and considerable muscle damage in your legs and abdomen... so why are you walking around like nothing's happened?