Someone hurt you — a friend, a teammate, an adult — and you couldn't say anything back, because of who they were or where you were or how scary it felt. So you bottled it. And then, later, a totally innocent person — a classmate, a sibling, a parent — did some small ordinary thing, and you unloaded all of it onto them. They had no idea where it came from. They got the anger that belonged to someone else entirely, and you knew, even as it happened, that you were aiming at the wrong target.