Final answer:
People often yell phrases like "Worldstar!" or "WorldstarHipHop!" when a fight is being filmed.
Step-by-step explanation:
In the context of recording fights, people often yell phrases like "Worldstar!" or "WorldstarHipHop!" when a fight is being filmed. This phrase originated from the website WorldstarHipHop, which became popular for hosting viral videos, including fight videos. When people yell "Worldstar," they are referencing the act of recording a fight to potentially share it online and gain attention.