While the others had switched to ogling the GPS, Felix was now crouching for closeups of the scratches, already surmising if there was a good way to duplicate those closer to the house somehow. Thinking about the marks in a practical sense was helping him to ignore the raised hairs on the back of his neck, at least.
"What if, uh..." Jack started, his facial expression more than relaying the fact that he didn't actually want to say this out loud, but the idea of it rolling around in his head where he was with it alone was probably going to be worse. "Those things. The ones from last night. We can probably assume they can go over the barriers if they live here, right? What if that's not one of our people moving, but one of those things moving one of them? If they're knocked out," or dead, his brain supplied unhelpfully, "and getting carried around, maybe they aren't getting zapped."