One key aspect is the incident itself. A simple call regarding a counterfeit bill turned into a life - ending encounter. The long duration of Chauvin kneeling on Floyd's neck is also crucial. Moreover, the public reaction both in the US and globally, with people from all walks of life coming together to protest and demand change for the better in terms of police treatment of black individuals.
Well, first of all, the encounter between Floyd and the police that should have been routine but turned deadly. Then, the role of Derek Chauvin and his excessive and inappropriate use of force. The video footage that spread like wildfire, making it impossible for the world to ignore what had happened. And finally, the huge wave of protests that swept across the nation and the world, with people demanding justice for George Floyd and broader reforms in policing to prevent such tragedies in the future.