Is there a term or word appropriate to describe the trick of using a general term and then explicitly adding a specific term to strongly imply that the specific is not part of the general? The trick I see never uses a negation or a word like "except." It simply "adds" something at the end as a slight or insult to the thing being added:
My classes are filled with really smart people. And John.
Before you are the best and most clever and most attractive and Susan.