Major league baseball is utilizing video technology to assist umpiring decisions for many different types of calls this season, and I've been fascinated to see how it is changing the dynamic of manager/umpire conversations. From what I've seen so far, the system will reduce the screaming/yelling/freaking out Earl Weaver/Lou Piniella-style managerial meltdowns by close to 90%. Another cool aspect of the system is that MLB has created a twitter feed that will document all challenged calls: https://twitter.com/MLBReplays