I don't know, I think she might have made it back. BF was cleared. Being young and fighting plus driving! It's so scary, after the moment you realize whats happening. From my experience, I've gotten into it with BF before driving and its not as if I could say find your own way back home or get out. I've driven a little faster than speed limit, switching lanes (not recklessly, just often), and speeding through a few yellow lights. And all the while one hand driving and one hand moving as I argue with him.
Same for him. He drives a little harder than me, but when upset he kind of pushes it with or without knowing. And sometimes I think I really don't want to be in the car with all that going on.. but for the record I don't live in a "College town" just typical town so I would never jump out and walk home. Just angrily say and sternly something of don't drive like that with me in here, stop.
A question you can add to list. (I haven't fully read the questions) What was in the bag she packed? I think only she would know what she would need. Like if she didn't need a toothbrush because she had one there etc.