I went to high school with one strange guy. Things used to break / fall around him and he sometimes talked into the void. Other times he would get up in the middle of the class and randomly walk around the room. One day he disappeared for two months and the teacher told us that he was in a hospital, diagnosed with schizophrenia. He eventually came back and finished the school with us, but his condition was barely managed and getting worse over time. I still think about the weird happenings around him.