Not true. Adolescents are insolent and defiant every single day in every single city in this country. Administrators and authority figures are called down to classrooms to deal with disruptive students all the time. Do you think she is the first student to refuse to leave a classroom when ordered to by a teacher? or refuse to give up a cell phone? I guarantee you she's not. How come all of those other incidents don't end up on the news. The reason this is in the news is because of the cop's excessive force. If he hadn't thrown her across the room, this would not be on the news. If he would have just taken her to the ground, and restrained her, this would not be the story it is. The cop's excessive display of force is what makes this news.
I don't disagree with you. My point was simply that everyone single one of these stories could have easily been avoided. Why put yourself subject to the discretion of an officers quick decision making ability? Just cooperate, you'll get your chance in court if it's actually something that matters. Officer's force was definitely excessive. I'm also not in a position to have a legitimite opinion on what his punishment should be, but I think suspension would be minimum.