Defining transformative masculinity

You walk home one evening, see a man arguing with a lady outside a home. As you approach, while heading to your house, you see the man slap the lady, he gets kicks her and in pain, the lady screams and quickly runs to the door and shuts it behind her. As a man, what will you do! Will you confront the man? Will you run to her aid when you see her being beaten? Will you pass by and decide it is none of your business?