"Oh, damn Hastur! I mean bless Hastur -- something, may Hastur have died a particularly painful death!" Aziraphale says, frustrated as he says it and honestly, he didn't even really mean it. He doesn't wish anyone a painful death.

"Well, let us have a look at it anyway," he suggests. "You're going to have to remove your trousers for this," he says, and he really was hoping that he'd never have to tell Crowley to remove his trousers in an apologetic voice. He can't believe that Crowley was trying to hide this from him, but at the same time, his heart hurts a little thinking about it, knowing full well it's because he needed a moment.