In theater, you get to rehearse several weeks, you memorize everything, and by the time you open, you know what the play is. In film, it's almost the opposite. You do your work on your own and maybe have a couple of minutes to rehearse. When the camera rolls, you generally don't know what's going to happen.
A lot of people, when a guy scores a lot of goals, think, 'He's a great player', because a goal is very important, but a great player is a player who can do everything on the field. He can do assists, encourage his colleagues, give them confidence to go forward. It is someone who, when a team does not do well, becomes one of the leaders.