Because they actually remembered "Hey Jude"! It's the song that Dean and Sam's MOM sang to them!<<<I think the song O' Death by Jen Titsu or someone should be on there! That's Death's entrance song and I love it!
I know I died. But something must have happened to bring me back to life like maybe and angle I don't know names Cas "griped me tight and raised me from prediction" (probably spelt the wrong) and saved me.