Wow....Great Discussion!!!!
Going back to my original play, I calmly informed the head coach that I will only speak to one of them and had better get control of his assistant. No threats were made, I just can't come up with a better way to explain myself right now.
He did so immediately and in the process, calmed down himself.
After the game, I explained to my partner what he should have done and why.
I have been in this situation several times and I like to say to the additional coach..."Hey, why don't you come talk to me right now." and then lead them away. I let them vent and I don't argue. In the end, this approach calms people down and better yet keeps them in the game.
I understand having to toss someone. More times than not, they toss themselves...However, it is our job to keep them in the ballgame whenever possible. We must be un-emotional and level headed at all times. Is it fair, nope.......But that is why we are all good at our jobs.
Hope this makes sense...I'm really tired right now.