This recording is a fake, I can tell it was pieced together over different recordings and the female comes in to clear as if she was talking into a mic and not a phone.
Further more you can't take hold half better yet a quarter of what the media tells you, if anything this will be no more this a publicity stunt just so they can up their ratings.
I am amazed at how many people buy into this crap and even if it was a true story, it isn't anything to go ga ga over heck there are millions of people who have this same kind of problem all over the world. It is just human to lose your temper, I am not saying this is right or wrong, just that it just happens and there is not one person on this planet that can say they haven't gone off on something or someone at one point or time in their life.
Just because it was Mel Gibson, all of a sudden its unheard of.
But ether way this is just a hoax that is getting out of control. Most likely if we was to dig a lot deeper this might have spun up to discredit him if he did something that ether the government, or the media is upset about. We will not know until the smoke clears where we can see clearly what is really going on.