[One of the problems of the Hell John had been in is that he saw people with wings on a fairly regularly basis. Do-gooder or cranky angels were always coming through to try to 'help' them or work side by side with demons. Some demons even developed them after awhile. A living human would have seen the wings Castiel can't hide, been surprised and wanted to know about them. To the demon John, they were a normal thing.]

[And that is a bit of a dent in his attempt to playact at being human so his still-human self doesn't realise what he is. Oh well. Of course, he also doesn't get that holy beings probably know what he is on sight.]

Full power. Is that what- [he waves his cigarette towards the wings folded behind Castiel] - those things are all about? You miss the clouds with harps and hit the ground? Or are you one of those sorts that just has them?