Yelling is everywhere these days. We see examples of this at sporting events, in stores, in the parking lot and some while driving their car. Wikipedia lists several reasons for yelling/screaming: 1 “Fear and Surprise” the result is to call attention to yourself. 2 “Happiness” which conveys a positive emotion to others. 3 “Danger and Pain” which informs others of danger. Reading on it cites the battle cry, death growl and rebel yell as more options to consider. Interestingly that this falls under oral communication to prepare for a battle.