Opportunity for job hunting suicide

So midway through the interview you're asked, "can you tell me about a situation where you were right and your boss was wrong?"

The first thing to realize is that this question is a set up for you to commit job-hunting suicide. A great answer can be a little positive, but give a bad answer and you're not going to get the job no matter how well the rest of the interview goes.

Worst case: tell the story of when you got your boss fired.
Second worst: tell the story of when you forced your boss to admit that he was wrong.

This question is neither a request nor an opportunity for you to explain how smart you are. It's an inquiry about how well you respect your bosses. They're looking for someone who respects the boss, believe me.

Your good answer has to be built on the concept of working with the boss. It's not important that the boss ever comes to agree with you or not. It's all about your respect for the boss, remember?