Recorded on a canon d550 camera. I live near a water tower built into a hill and firework displays cause a strange echo as the shock wave passes through. Listen to the first burst of bangs and there is a faint sound of "gravel falling into water". I suppose the frequency of the explosion is reverberating in the air gap in the water tower. There is a second burst of fireworks which are far away. Traffic from the a3 road is audible.
