Margaret Ford and the cop

My thought of Margaret Ford being a strong woman still haven't change. Her character really showed when she "shot" the cop. Though it was all a plan Mike set up, I really thought the whole "murdering" the cop was real. When Margaret shot him, I was really shocked how she reacted to it. Margaret seems too calm to even realize what she did. Normally for a situation like this, anyone would be scared and starts to freak out but as for Margaret, she stood there dazed off and left the scene without crying or screaming like a normal human being would. If I was to be in Margaret's situation--actually I don't even WANT to be in her situation.. but if I WAS to be in her situation, I would definitely screamed and terrified for life. I would've broke up crying right then and too shocked to even do anything else. I really admire Margaret's character...