Murder is generally reserved for an act that is premeditated with intent.
This lady didn't pull out of her driveway intending on acting out a grand theft auto scene in real life.
That being said, it wouldn't be involuntary manslaughter either, as she clearly had to know aiming at him and mashing the gas could cause serious bodily harm or death.
File this under attempted voluntary manslaughter because of provocation and the time involved between the events shown on film. She should sit several years in jail.