Maybe he wasn't yelling SJ. Consider this: at that very instant, his automated aural interface went on the fritz, and to compensate, his vocal amplifier ramped up. It was all a mechanized misunderstanding. ...a day in the life of a sinister tin man. You like how technical all of that sounded? I just sorta pulled the terminology out of thin air. Words are not a small part. There deserve as equal an emphasis as motive, action, reaction, and emotional consistency. The actual dialogue is the culmination of, the embodiment, of all the character elements. Dialogue is much more than a recording of a conversation between characters, it's a way to let the audience know how that character FEELS. This is especially true if the writing is in 1st person, as all the reader has to go by is the report of events given by a character. Physical dialogue, the words, are a vehicle for readers to gain a greater understanding of a character's background, personality, and to get a different perspective on the story apart from the voice of the author. In essence, character dialogue is a new lens for readers to view the goings on of that particular universe. In the SW pantheon, the best example I can think of is Yoda; if Yoda didn't talk like Yoda, he wouldn't be Yoda.