It’s called a character arc, and everybody has one. It’s the progression of a character throughout a film as they go from “A” to “B” and change emotionally, intellectually, and physically along the way. It exists because nobody sane wants to watch two hours of some dude sitting in a chair…which just so happens to be the story of how this very list was made. When it comes to action, horror, and any other fast-paced genre of film, one of the best things about watching the characters adapt is that since the environment they exist in is so do-or-die, there is a incredibly steep learning curve – so by the end of the film, you most likely have a completely different person you started with…and considering that they are still alive, they probably got way, way more badass along the way.