Since childhood you've wanted to build one, with cardboard of course, but when it rains cardboard just falls apart and there are so many bodies.
Two years pass and the rotting stench no longer bothers you at all. it looks like a fortress built of beef jerkey and body parts. Over the years some hallways and lower parts of the structure collapsed, but you've lived and learned.
You look out into the distance atop this fivehundred foot high castle of corpses and swear you is seeing something in the distance. Time to break out the people-a-pult you built last year.