Something along the lines of "You did this to me but you have NOTHING, you have no life, you have no future, no girl will ever take the smallest interest in you, no girl will ever get more physical with you than a handshake, you will never have friends, you will never make up for your childhood, you will never succeed in anything, you have nothing."

And yes I have done both to idiots in public who then told stories to themselves in their head about why they aren't pathetic for letting a loser category person do this to them.