From George Atkins.  Brilliant:

So Carina made a run for it, having apparently abandoned her colleagues to die, only to be surprised/shocked that they are still alive. And while the two hapless souls are running towards her and a possible exit (from the tunnel or the story?), the ever-informative and scheming Mark hopes to confuse Gabe by looking off to the side, yelling “Over there, Gabe!” Or maybe the injury has left Trail addlepated; and he not only does not hear Carina yelling out to them, but seems to be confused by who and what is clearly in front of them.
You see Dennis, it is not just the readers who are confused here, but the characters, themselves. From one sequence to the next, they have no idea what they are supposed to be doing, where they are going, why they are in the cave, or even if they are really supposed to get out of the cave. I’d think they would welcome Jefe and his automatic rifle about now. And point it towards Allen.