[icallfouls]

I really don't like it when a partner goes over and tells the coach they have lost the use of the coaches box. I do not have my books with me at the moment and I can't find any reference to it online being the appropriate mechanic.

The coaches know the rule. I would say it is likely the only rule they understand the best.

Even so, in my opinion, you went over to the coach and it only exacerbated the situation. You went to him, he had no place to go to avoid your comment on something he already knows. I think you made the situation worse in that moment.

There is nothing good by going over there. It looks like you are trying to coddle the coach after your partner made a call he disagreed with.

If he needs to be reminded, there is a better way to do it. He probably still needs a moment to collect himself.