We've all had a coach come out to us after our partners have made a tough call. They are trying to get us to disagree with our partner. If they come to me and I think my partner might have totally kicked the call, I send them to my partner right away. But I often say something like, "You need to discuss that call with him, he's a good umpire and he was in position to make that call." or "Looked like he got it right to me coach."
With that the coach rarely delays the game any further and we "Play Ball". Their total reason for coming out is to get you to agree with them. Take that away and they're done.