Surveillance Footage of the GG-stones Explosion

Eh, could be a shaped charge or a large amount of gunpowder. The cloud of dust on the backside is too big for a projectile and suggests an explosive. A concentrated blast will throw the rocks closest to the charge further, with rocks further from it going shorter and shorter distances. If that was destroyed by a projectile, it would have to be from an artillery cannon with a high-explosive round. The debris also comes straight out, not at an angle, so it could not have been from much of a distance. There’s a forest across the street, so it would have had to have been either from the street or from the other side of the forest, which would require an arcing shot, which is ruled out by the path of the debris. Therefore, several pounds of gunpowder placed in a steel container directly against the pillar is the explanation with the fewest assumptions and fits the evidence best.

Still, the questions remain: Who, and why? The method is immaterial in the face of those questions.