Why do people scream at each other?

Because I felt like expressing my anger at you! I feel it is a way to calm me, by using other people to scream at, many people do it. Also when you annoy someone or do something you weren't meant to the person feels angry that you have done this, so by showing you they express it via voice! People scream at each other because they have so much anger that the scream to let it out! It's kinda scary because the might start to push, shove, or kick. So, stay out of their way! Yikes!