[@Marik], the car wasn't moving yet. It was still parked. And, on top of that, as a junior detective, Carla would not yet be allowed to drive the car, hence why she was waiting for her senior officer....

And on top of that, in modern police cars, there is a layer of wire in between two layers of glass which separate the policemen in front from the criminals in back. So, if your character reached around and hurt the officers, he would have to slice open his hands into little bits in the process.

Also, how would your character grab her hair? It's too short in the back (in the image I posted) to be grabbed and held onto.

What I'm saying is, your post makes absolutely no sense at all, in or out of context.