What was the reason your school was considered “haunted”?

I’ll go first:

There were two girls and a guy that were trying to skip class by getting out of the school (your equivalent to junior high), they tried this by jumping a wall on the back of the school were they left all the old broken chairs and metal equipment, (this had been done countless times before by other people) the two girls made it up the wall with the help of the boy, but when the dude tried to jump to grab their hands, the girls didn’t hold him with enough strength and he fell right into the broken metal chairs. We was pierced by the metallic scrap in three different places. He didn’t make it. Suffice it to say that it discouraged anyone from ever trying to skip school again by climbing “The haunted wall”