> ”Rolling coal is a form of conspicuous air pollution, for entertainment or for protest. Some drivers intentionally trigger coal rolling in the presence of hyb

> ”Rolling coal is a form of conspicuous air pollution, for entertainment or for protest. Some drivers intentionally trigger coal rolling in the presence of hybrid vehicles (when it is nicknamed "Prius repellent") to taunt their drivers, who are perceived as being environmentally motivated in their vehicle choice. Coal rolling may also be directed at foreign cars, bicyclists, protesters, and pedestrians.” https://en.wikipedia.org/wiki/Rolling_coal https://en.wikipedia.org/wiki/Rolling_coal