Nothing as long as you leave when her bf gets back.
If you decide to take it outside don't bitch when he death touches you.
Exactly. We don't know how it went down yet, but from what we do know so far, it went down something like this:
After returning to find a guy hitting on his girl, guy A asked guy B to leave. Words were exchanged to some extent, and somebody invited the other outside. Outside, guy A ko'd guy B, and then guy C (friend of B) comes outside looking for his friend after hearing he got ko'd, and is immediately ko'd himself by guy A.
That's all we know.
Given that info, it likely unfolded in one of two ways.
Either Guy A was overly aggressive and assaulted guy B needlessly just for talking to his girl, and then ko'd guy C just because when he came outside to help his friend,
OR
Guy A respectfully asked guy B to leave his girl and himself alone once he returned and was met with rudeness and aggression. Guy B invited him outside and got layed out, and then guy C charged outside yelling, aiming to fight as well, and paid the price.
I'm inclined to think it was the latter, as most professional fighters, save for the complete hot heads, are hesitant to beat people down in the streets unless they really have to or the person is a game participant.