I hope your atty will jump in if any tricks are tried.
Your atty didn't ask you to come in early or call with a heads up on what to expect? {if not, I'm not really surprised, but it would be nice if they did that}

I guess the basic suggestion is to keep answers brief and to the point.

If they ask just clearly explain your pain and how it affects all aspects of your life.

But I've never been thru a interview like that- so I hope if anyone has they can tell you about the experience.