I haven't seen the postgame interview yet,but IMO it was a buildup of some stuff from yesterday... ball/strike calls mostly. The trigger was, Vol fouled a strike 3 pitch, and it hit the dirt but Plattner wanted the play reviewed because he thought he caught it clean. Vaughn, I think realized it hit the dirt, but asked the umpire to ask for help on the call. Which he did, and Vaughn never asked for a review. But during the pretty quick exchange, something was said and Vaughn went off. Ump let him walk away, but Vaughn wanted to get run and said something else. I think he was just trying to show the umps he wasn't happy with their efforts and also light a fire under his own guys who were getting knocked around early.