Yankees manager Aaron Boone lost his mind on an umpire during NY's game Thursday ... melting down on the guy in an absolutely epic tirade that was all caught on broadcast cameras.
Boone was furious after home plate ump Todd Tichenor called an apparent ball a strike during the Yanks' tilt with the A's -- and then he was promptly ejected.
But, Aaron was so livid over the call and being thrown out ... he ran out of the dugout to scream at Tichenor.