Lasciel and MentallyStable!Cas have a conversation, somehow, wherein they discuss how interesting certain humans are, just how much they hate Lucifer and the other fallen angels, their mistakes, their triumphs, why/how exactly they fell, etc.

*Shrug.* I don't know why I have this in my head. But it seems like it would be one hell of an interesting short, so I thought I'd put it out there.