The rumblings grew ever louder and the shaking grew ever worse. Cracks continued to be heard, but now they began to appear on the ground as well. Then it stopped quite suddenly and all was still for several seconds. Until...

SQUEEEEEELLLLLLCHHHH.

A massive sinkhole opened up in the earth. Its middle was directly over the central circle of the Quidditch Pitch. The hole kept falling in on itself, its edges rapidly approaching the stands and goal posts. CRASH! Sure enough, the far set of golden hoops fell victim to the abyss just before the dust settled.

Hopefully no one was on the Pitch at the time or they would have been swallowed up into the earth.