However, they would see through that quite quickly and might no longer take seriously your requests for legitimate discussion. You might sincerely ask the court and opposing counsel to elucidate their points even further. You want so much to be ever so clear about what they are telling you. But that also could well backfire for the same reasons. At each answer the witness gives, you might show your appreciation.
Many attorneys have the annoying habit of repeating each answer before asking the next question.
You did not cough. But now is not the time to adopt that annoying habit. You do not want to annoy the judge, you want to win his appreciation for your position. You may not ask me that. On the other hand, if you focus the expert only on the topic you are pursuing, the judge would better appreciate that you are not wasting time but are employing it to the fullest.