Tsk, tsk, tsk, sometimes it is better to let sleeping dogs lie. Chris Brown had a mini rampage at the studios of Good Morning America after he was quizzed about his assault on his ex girlfriend Rihanna during an interview. Seems a dressing room window got the brunt of his rage after he threw a chair at it. He also ripped off his shirt before letting rip at a producer. The hissy fit was the end result of a persistent Robin Roberts continually referring back to the Rihanna incident during the interview, despite him looking decidedly uncomfortable. Bad form all around.