Cooperate with him every step of the way and this will prevent you from getting hurt. If he dismisses you, leave the scene immediately and don't look back. Don't call the police until you are in a safe place. Most crimals are not anxious to hurt you. If there is no violence, the criminal gets a lesser charge, but you are unharmed and alive.
Mugging is like a job to many practioners.
If you respond in a business like manner with a minimum of words and gestures, it will likely be over quickly and without injury. The mugger might think you are reaching for a gun. Don't give him dirty looks or make judgemental remarks. Don't threaten him with hostile comments. Don't be a wiseguy or a joker.