Good Advice from All.
We've all blown calls and it sucks.
Jim Joyce is the best umpire in the world and he "Kicked the shit out of a call." in Galaragga's 28 Out Imperfect game. So it happens. After you're done kicking yourself and after the coach has finished kicking you get over it and do your job.
Let the coach have his say. Give him extra rope if you think he might be right, because you had a bad angle or just blew it or whatever. When he's done go back and do your job. If it's a blown judgement call. You call a runner out at 2nd on a steal and you know that the runner got there first but you just botched it. Well there isn't much you can do except eat it. But if it's a pulled foot at 1st or a swipe tag at 1st you can and should ask for help if you're not sure. That helps you get it right without a coach's assistance.
If it's a point of rule and you're unsure of the correct interpretation, then go ask your partner. Hopefully he knows and you can get out of the mess.
Sometimes we have to eat a bad call, that's called judgement on our part and sportsmanship on the coach's part. And usually that's where we have to take a beating by the coach and as long as it's not too bad we just deal with it and move on and nobody gets ejected. Of course if he touches you or uses 4 letter words that's prohibited under Rule 3 and Rule 10 so go ahead and chunk him. But if he's just mad but under control... well common sense says you need to give a long rope. "The better to hang himself with."
But if it's a point of rule... You've got to get that right. Nothing is worse than an umpire who doesn't know the rule. So you have to study and read the rule book and know the rules forwards and backwards so that when these coaches try to trick you you won't be tricked and can bring it back to judgement.
We always want it to be about judgement.
They always want it to be about rule application/interpretation.
"Have them bring the fight to you where you are prepared. Do not fight the enemy where they are prepared. Surprise him by attacking where he does not expect it or cannot defend it. Do not allow him to surprise you."
-- Sun Tzu, Commanding General to the 1st Emperor (Qi-In), The Art of War, 551 BC