Originally Posted by The Narrator

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.

Originally Posted by The Narrator

Though the growth of the sinkhole began to slow down, it didn't stop before it reached the stands. The second set of goal hoops had long ago succumbed to the collapse, and now the stands themselves began to tremble.

Shake, shake, creak, creeeak, snaaaap SNAP!

The first section of bleachers came down and disappeared into the black hole. Like a set of dominoes, the rest of the stands began to fall, section by section. In less than a minute the stadium ceased to exist, having given way to the sinkhole that by now had reached its final size.