Board Thread:Speculation House/@comment-26371016-20150512012344/@comment-4010415-20150515091311

I'm pretty sure her asking about the crew members wans't so much "If he still cares, it'll be my reason to stay," as it was "Wait, if we blow up the train, they might die! Do we have a plan for that to not happen, or did no one think about this?"

So, she asked Adam what they'll do about the crew members being put in danger by their plan, but he responded "What about them?" showing he didn't even think about them and clearly doesn't care. This wasn't quite a "Screw this, I'm out of here" moment. This was the moment that Blake realized that Adam, to quote Blake herself, "had become a monster." The realization that he is a "monster" now was the last straw for her.

While he was fighting the spider droid, she saw an opportunity to both leave and save the crew members. She was pretty clearly sad when she left, and it may have been sadness that Adam is now a monster, as well as sadness that she had to leave him. When she cut the connection between the train cars, she made the train leave behind Adam and its cargo. The crew members up front were safe, and she was able to get far, far away from Adam.