User blog comment:Hunterinpurgatory/How long will Dean and Cas be stuck?/@comment-4920092-20120525130440/@comment-76.198.241.109-20120611141049

after the encounter with raph castiel put the souls back into purgatory and the only thing to "remain" in his body were the leviathen hes said they were too string that they HELD ON to his insides thats the reason they got out instead of being put back into purgatory