Bipolar anyone

Hi, I have a son who has gone thro tremendous events. Loading a marriage and 2 small children. Lost his license from a dui., Has suffered many set backs , does not take his meds. Last night I saw a full blown episode of anger. His has now got his car back and license, the car has the wheel fall off. In our driveway so sell was safe, but the anger that followed was awful. Of course his brother and I wanted to help, he started yelling and threatening, throwing thing s ,ended smashing his windshield from throwing a lug but at it….what do you do in these situations? By th e time he was done he had said awful ,hurtful things. We were upset. Like how do you handle this……