Above: Ozzie Guillen as seen on TV during the fourth inning of Sunday's Nats-Marlins game. Ozzie gesturing first with his hands, then a bat, towards the Nationals dugout. We're not professional lip readers here at Nats Enquirer, but it appeared Ozzie was screaming about a "Mucking Toolshed" or "Ducking Bunt" while talking to the umpire, and yelling at Davey Johnson. Regardless of what Ozzie said, it seems he was upset about something Bryce Harper did with his bat.
First inning: Harper steps to the plate for first AB, crosses his bat across the plate, points it towards Marlins dugout briefly?
Then someone (Ozzie?) might've said something to Harper - he smiled towards Marlins dugout a few pitches later?
Then a shot of Ozzie on TV - pointing and muttering someting (might've been "Bull shed"? Tool shed"?)
Fourth inning, Harper's points bat as he approaches the plate. Ozzie already screaming from the top step.
(All Screencaps via MASN/TV)