Rocks fall! Everyone dies!

From Fandom wank wiki

rocksfall-by-soula.gif
by soula

The usual suggestion for how a popular series should end, especially Harry Potter.[1]

Also good for ending: ill-fated Everest expeditions, awkward conversations with your kids/parents about the birds and the bees and the sticky magazine featuring neither discovered hidden under the bed, and long-term relationships where there's potential for blackmail.

The meme originated as a D&D players' in-joke, but was popularized by the web-comic Something Positive before being picked up by Fandom Wank.