Apart from the obvious -- and we are really past being surprised by just about anything these days -- note that police all over the country will watch this video and learn from it. They will conclude, as they always do, that they need more power and to exercise that power quickly when a situation starts to get out of control. The crowd was close, the struggle protracted, and the hostility to the police was intense. The officers here put themselves in a situation they could not control. It was only the restraint of the crowd that protected them.
Anyone who attends events like this, or makes any effort to protest in public, take note. The time will come when the slightest deviation from the norm, or the most benign of confrontations with authority, will result in the commoner being grossly overwhelmed with force applied with very quick effect. Above all else, the police will protect themselves and assert control.
Freedom of assembly, to protest, to speak -- these are all niceties we imagine we possess in a time of peace. The reality, particularly when one needs these liberties, is far different. The man arrested in this case acted with the confidence of a free man who did nothing wrong. That attitude can get you killed. Choose how you will, but know the consequences. Authority will not tolerate an absence of control. You may be right, you may be innocent, you may think you are free. None of that matters when law enforcement decides you are a problem, or wants to make you a problem.