The guy's a method actor - he was in character, accent and all. I can totally understand his reaction. And even if it sounds excessive to us I bet outbursts like this are common place on a film set.
My guess is later on he would have been fine and the whole thing would have been forgotten about.
Found this actually:
"An associate producer for the forthcoming Terminator Salvation movie has defended Christian Bale's alleged on-set rant, insisting the actor was a "consummate professional" during filming. A man said to be actor Bale can be heard angrily screaming and using profanity at the movie's director of photography, Shane Hurlbut, for distracting him during shooting by walking into his field of vision.
In the four-minute tirade, Bale reportedly shouts: "I'm trying to do a ******* scene here and I'm going, 'Why the No Swearing! is Shane walking in there? What's he doing there?' Do you understand my mind is not in the scene if you're doing that?"
The man later promises to "kick his No Swearing! ass" before threatening to quit the film unless Hurlbut was fired.
But Bruce Franklin, an assistant director and associate producer on the fourth Terminator film, insists the star was only upset for a short period of time before his "moment" passed.
Franklin tells E! Online, "If you are working in a very intense scene and someone takes you out of your groove... It was the most emotional scene in the movie. And for him to get stopped in the middle of it - he is very intensely involved in his character. He didn't walk around like that all day long. It was just a moment and it passed."
And Franklin is adamant the rant has only been released to slander Bale, who he worked with on the 2000 movie Shaft: "This was my second movie with Christian, and it has always been a good experience with him. He is so dedicated to the craft. I think someone is begging to make some noise (controversy) about this, but I don't think it's fair. The art of acting is not paint by numbers, it's an art form."
The audio clip, allegedly recorded in July 2008, was obtained by TMZ.com, which claims the film's executives sent the tape to their insurance company in case Bale didn't finish filming the movie."