Voice is a rather fascinating vessel.
On ordinary days, people use it to sing, laugh, recite about love; they also use it to cry, shout, and vent frustrations; it can even be turned into a weapon for reconnaissance, communication, and killing.
On extraordinary days, however, the voice could be a sigh from Melpomene, a whisper from Iris, or a force gushing from a bullhorn, powerful enough to break dimensional constraints.
When Bull Head puffed his cheeks and blew hard into the bullhorn, the entire sandbox world was plunged into an irreversible state of collapse. As the final straw that broke the camel's back, the sound rushing from the bullhorn not only shattered this fragile world but also seemed to break some binding force.
It was like the appearance of a mirror after being struck by a hammer.