A construction worker has sparked concerns about worker safety in China after making an extremely effective demonstration of the strength of his helmet compared to that of his supervisor.

In videos posted to the popular streaming platform Kuaishou that have been viewed millions of times, the worker, surnamed Dou, bashes the two hard hats together, revealing that his yellow helmet comes away from the collision with a hole while his manager’s red one does not.

While the videos have received significant attention online, it remains to be seen whether it will actually on spur in action on the part of officials.