Why bother?
I've seen dozens of movies with this same premise. Someone wants to go back and redo a moment to change their life. Basically, they are looking to change their life from that moment forward. But when the opportunity comes, they always decide they would rather keep the life they are trying to get away from rather than make the change. I just don't get it. Make the change, have a second chance at life. Just once, in a movie, make the change.
Take a chance, flip a coin, everything is 50/50