100 words - The Real Face/Off

Recently, I came across a movie scene on TV where I saw an actor’s neck and back. I was waiting to see his face, but the scene ended without a single clear shot of it. I was in suspense in an otherwise boring movie.
What if you would make a movie in which you never see the main character’s face? This would not be because the plot required the character to be anonymous, but for style’s sake. It would also be a big challenge for the actor. How to express sadness or anger without the ability to show your face?