During a concert on Thursday in Oslo, Norway, Justin Bieber became angry when his audience prevented him from fully wiping the stage floor. After a moment, he said, "Guys, never mind (turned and walked off the stage), I'm done, I'm not doing the show ..... I'm not doing the show."
While not from an optimal angle or resolution, the above video captures the event. We certainly see very little of Bieber's face with any clarity - however there were several significant nonverbal tells.
Note how Mr. Bieber removes his jacket and throws it on the stage floor and then proceeds to remove his hat and microphone.
When a person removes - and then throws - articles of clothing (or items which they may be carrying, etc.) in a sudden manner after a declarative and angry statement (as did Bieber) - this action can be accurately thought of as a surrogate act of violence (In less dramatic examples of this same behavior, the article is not thrown - despite its quick removal). This display is of course, a manifestation of a loss of impulse control.
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