It comes without warning; you can't choose whether or not it happens to you. It's a calling. The act of someone needing you, not someone else, but you. You are the hero they need to save them, before there's nothing left to save. You stay up late trying to find ways to become this hero. You and the caller talk as long as the caller wants. While this might not be the ideal situation for the hero, they do it anyways in order to make sure the caller doesn't end. The hero swoops in at every situation they can, trying to convince the caller; trying to say how much they're needed. Many times, they succeed. The caller decides they want to see another day. They want to stay strong. That gives the hero relief, and only pushes them to try harder. But, there always seems to be one final time when the hero's too late. This is the time where it's not only the caller's end, but the hero's, too. The hero hits zero; the hero doesn't want to continue when they know how they could've prevented this. And that's when the cycle restarts- the only difference being the hero is now the caller. The new hero, on the other hand, unknowingly waits for the call; the call that could save a hero's life.