User blog comment:ImperiexSeed/It's Battle Time!/@comment-24169020-20120902212446/@comment-24169020-20120903005841

Simialr to both Castiel during the first ep of season seven and sam possessed by lucifer.....he was super-powered due to having used witchcraft and being tied to a demon, he had to over-power the spirits to stay in control of his body to fight it but I doubt he would do it twice