This isn't really news in my opinion. A thug with anger issues punches a clerk for some innocuous reason, and a security camera catches it on film. It is disturbing and sad but unfortunately not surprising, and not uncommon enough to be news worthy. As for the people moving on like nothing happened, the guy is huge. I imagine fear of redirecting his anger at themselves is mostly to blame for their apparent lack of concern. Also certain aspects of the store and people in the footage make it apparent the the store is located in a low socioeconomic area. People in those areas tend to learn to keep to themselves when violence goes down as a matter of self-preservation.