My Boss had a Meltdown and we were in the path

I SPEAK WITH EMPLOYEE WHO HANDLES MY CALLS; BOSS SAYS HE NEEDS METRICS TO JUSTIFY MY POSITION; HE GETS MAD AND CALLS US UNPROFESSIONAL; WE STAY AFTER THE MAIN MEETING TO DISCUSS WITH BOSS; HE ACCUSES US OF AMBUSHING HIM; HE CALLS ME STUPID