Low-effort story idea about a delusional kid (modnote: just using my mod skills to keep owner)

A kid believes that he has superpowers, and always yaps about it to everyone. Of course, no one believes him. At the end, he tries to prove to everyone that he can fly. As the whole school watches, he jumps off a water tower and dies (turns out he never had any powers all along, and he plunges to the ground instead of flying)