She was not intimidated
Maria made the decision not to look away. She made eye contact with the girl to demonstrate that she was not afraid of her and that she would not let her get away with it so easy. In response, the girl simply rolled her eyes, clearly annoyed. What a jerk!
It’s on
Maria couldn’t believe what was going on. These things are only seen in movies, but actually seeing them is an entirely different experience. She felt compelled to exact vengeance on this girl, so she looked to the man next to her as a sign that “it’s on.”