While revising my manuscript I noticed something...I write a ton of dialogue. I mean probably over half my story is dialogue. I haven't made up my mind yet if this is good or bad but I think I need to add a bit more narrative to avoid over telling.
I also realized I have a lot of angry characters. Why shouldn't they be? I've killed off half the members of their family. So while I have all these half crazed, angry, teen age warrior's running around they tend to get a bit nasty with each other some times. My job is to show their anger and express some of it through dialogue.
First thing, every one expresses anger different but there are some common elements. When people get in a verbal fight the goal is usually to say something to make the other person mad. The better you know a person/character the easier this is to do. You can attack their flaw's, looks, cast blame, defend yourself or destroy a dream. An angry person will often say things they don't even mean. The words are usually spilled out before a person has thought about what they are actually saying. Your characters should be doing this to.
When my characters are fighting I like to use shorter sentences and paragraphs. I don't like to bog it down with descriptions or narrative, the stage should already be set. I also write in physical movement the help keep the pace up.
If you have hints how your character's express anger I would love to hear them. As usual I get all my dialogue tips form Gloria Kempton's book "Dialogue".