I was in this situation once, but it was a setup. At a New Years event at out door venue Tens of thousands revelers. I ran into a young lady I just recently met. As we were talking I saw a young man being overly aggressive with a girl and she was telling him to stop and leave her alone. I spun around and asked the girl is everything alright. Two other men moved in behind me to sucker punch me , as it was a planned attack. To my shock a mass of large men surrounded them and the girl I was talking to told them forcefully to leave and they did. The large men was her big brothers.