Mack liked the way Martha was thinking regarding the shelter. He liked people who put effort into thought. Even if it was something minor like a suggestion for basic shelter building, it was smart thinking. Though he didn't know her well at all, he could sense she was intelligent.
"I was a mechanic," he said simply to her question. Of course, he was more than that, but he'd been undercover a few times as just an average mechanic. In actuality, he was an engineer and a brilliant tactician.