A significant student rally was held in downtown Belgrade on Saturday to pay tribute to the victims of a railway station collapse, but the event took a chaotic turn when attendees were gripped by panic caused by a loud and mysterious noise. There are speculations that a ‘sound cannon’ or ‘vortex cannon’ could have been the source of the disturbance, despite Serbian authorities refuting claims of using any acoustic weaponry. The unsettling incident led to many participants requiring medical attention for lasting symptoms. The rally, intended to be a solemn occasion, was marred by the unexpected turn of events.