You may remember that Christian Bale went nuts on the set of "Terminator Salvation" a few months back, threatening to stop production and beat some serious ass.
The incident was audiotaped, and it's amazing. It happened on the set after a director of photography accidentally ruined a scene by walking onto the set. Bale lost it, screaming, yelling and threatening to quit if the bosses didn't fire the dude.
Film execs sent the tape to the insurance company that insured the film in case Bale bailed.