Help Wanted (Interview)

Hi, Everyone,

I am awaiting an interview for a Canadian Law Enforcement agent
position. I ever attended several similar Law Enforcement position
interviews, but this one will be different and all the questions will be
hypothetical ones. Below is one of the possible questions and could you
please provide me a piece of advice?

Question: You are an off-duty xxx officer (you don't have
authority to enforce the law outside the workplace) and you are in the
line at a movie cinema. All of a sudden two people burst into a
fight in front of you and what will you react to it?

Thanks for your comments in advance,

Mr.Mississauga