Most Helpful Guy
This is probably a time to be a little more forceful than usual. Throwing things at each other is a line that should never be crossed, ever, and if you haven't already made that clear to him, do it. He should feel really guilty about it; the apology is a good sign at least. If it ever happens again, you have someone with anger management problems and should probably leave. Also keep in mind that guilt over the throwing and guilt about the argument are different; he might still be right about whatever it is, and you shouldn't act like you won because of this, but his methods are unacceptable.
Most Helpful Girl
Maybe you should avoid getting him mad then. If he gets mad over everything, and if he continues to behave this way, then i would end it. But maybe you upset him too much. Just try to avoid conflict, and don't be a bitch. If it is over something serious, then you have the right to get mad (i. e. child custody or cheating, etc.) But if it is over something minor, just try to avoid conflict. i don't like making my man mad. It sucks.