First, nice reading by Kate Baker. I've only started listening to their 'cast recently, so I hadn't heard this before.
The story itself, while a nicley crafted piece of writing, just didn't have enough 'story' for my tastes. To me, it seemed more of a thought experiment than an actual story. I kept waiting or something to happen, and then the piece ended. The premise is utterly horrifying, and I think it would have been right at home over at PP.
I understand that the MC had been more or less stripped of personality, and nearly her mind, by her ordeal, but what was left wasn't much of a character, awful as her situation was. Gary was certainly the lucky one. I might have been able to connect to the story better if it had started before the collision, but as it was, everything was pretty much done by the time we see the scenario. So, a well written scene, but it just doesn't hit me as a story.