This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / H. G. Wells
A story called The Cone, which is about a steel works manager whose disgruntled employee throws him off of a catwalk onto a red hot metal cone on top of a blast furnace. The story then goes on to describe, in the most gruesomely horrific detail imaginable, how the man is roasted to death.
"The Kingdom of the Blind" reverses the above example. The realization that they're better at tracking him blind than he is with both eyes; all he can do is watch. And, of course, why they're tracking him!
"The Empire of the Ants", in which the intelligent ants decimate entire villages, seemingly unstoppable. It's all but said that they will eventually conquer the world.