Our teacher was reading a short story by Ray Bradbury aloud, There Will Come Soft Rains. It describes a robotic house that keeps functioning after its human inhabitants have been eradicated by some sort of bomb.
Now, I'm very grateful that the teacher read this story. It introduced me to Ray Bradbury, for one thing, and the more we read the longer we spent time doing things other than math. But it also blew my mind and traumatized me just the teensiest bit. C'mon, I was like, eleven, and the story hints at horrible, horrible nuclear war!
Did you ever read a story that was a little too mature for you, traumatizing your poor younger self? Let's hear it.