BOSTON — Massachusetts Avenue turned into a circus of chaos last week as more than a hundred kids in hoodies swarmed the street on bicycles, blocking intersections, swerving into traffic, and treating one of Boston’s busiest corridors like their personal playground.

The rowdy pack clogged lanes Back Bay, popping wheelies and blasting through red lights as cars sat trapped in a rolling snarl. Delivery trucks, buses, and commuters were boxed in while the riders laughed, shouted, and turned the city’s main artery into a lawless stage.

The timing couldn’t be worse. Just as the school year begins, Boston’s families are already on edge — and the sight of a hundred teenagers commandeering Mass Ave at rush hour has parents clutching pearls about what’s coming next. The city insists classrooms are safe, but if this is how the fall starts, Boston looks less like a hub of education and more like a playground for chaos.