Watch this great video backed up by lots of research by the School of Communication at Cleveland State University on how lateral movement -- from one side of the screen to the other -- helps tell the story to the audience in a very subconscious sort of way. It turns out that viewers have very distinct patterns of interpreting what's on screen based on where a character is moving to and from and even what side of the screen they are on. The next time you watch a movie, maybe you'll catch this too!