I think I am going to begin to yell while in the bookstore.
What is the point in you yelling while standing in the bookstore?
Well, for one thing it will make me feel better.
People in bookstores are trying to concentrate and you screaming around them is disrespectful. Go outside to an isolated place if you need to let off some steam.
Oh, I didn't realize this would disturb people, I'm sorry about that. I agree to take my anger outside the store if it will make it better.
It is good that you agree to take your anger outside of the store. Just try your best to be courteous to the people in the bookstore reading and searching for books. There are plenty of other places you can go to let your anger out.