Robert Downey Jr. has been in the press circuit to promote Marvel's Avengers: Age of Ultron, but when Channel 4 interviewer Krishnan Guru-Murthy asked him about his past, the interview suddenly became uncomfortable.
You can see Robert Downey's suppressed anger in the clip below (around 3:50).
"The reason I’m asking about the past is that you’ve talked in other interviews again about your relationship with your father and the role of all of that in the dark periods you went through, taking drugs and drinking and all of that,” Guru-Murthy explained. “And I just wondered whether you think you’re free of all of that or whether that’s still something you — ”
“I’m sorry — what are we doing?” Downey asked.
“Well, I’m just asking questions, that’s all,” Guru-Murthy says.
“It’s just getting a little Diane Sawyer,” Downey Jr. said, removing his mic and walking out of the room.