We're told after the interview, Brown freaked out, storming into his dressing room and screaming so loud, the people in hair and makeup became alarmed and called security.
We're told Brown was out of control, and one source present tells us he smashed a window in his dressing room, and the glass shattered and some shards fell onto 43rd and Broadway. ABC security tells TMZ ... the window was shattered with a chair.
We're told by the time security rushed the area, Brown had ripped off his shirt and left the building, blowing off another performance he was supposed to do for the ABC website.
And sources say ... on his way out of the building, Brown confronted a segment producer, got in his face and stared him down. People from the show got in between Chris and the producer to diffuse the situation.