Guys What Will You Do If This Guy Slaps Your Lovely Girlfriend(picture)

Lets just imagine you went to a party with your babe, and this guy pictured above happens to slap your babe for what so ever reason, guys what will you do?.
For me oo,the best I can do is apologize to the guy whether he's at fault or not ,and rush my babe to the nearest hospital, only wicked babes will come here and call me a coward, I gree ,but if you love me you won't let me face that thing. so guys share your actions, I know they are some brave ones amongst us here.