There's a conversation, early in The Order 23 Job, as they're going to steal a hospital, between Parker and Nate that I have always loved and can now rant about now that I have Tumblr.
Nate has pretended to be a doctor and they are now setting up in a hospital so he can not only continue to do so but can do so more thoroughly. Parker is . . . confused, for one. Concerned. Curious.
The conversation goes as follows (to the best of my hearing):