There’d been no real warning. Everything had been quiet, with Mary squatting on the floor next to Sly, watching her carefully. At first Falcon had thought that’s all it was—just watching. But then he'd kind of . . . opened up his perception —that was the best way he could think of it. Opened himself up to additional data, data that wasn't coming in through his normal senses. Kind of the way he’d been opened to the alternate reality of the plane of the totems. And then he’d understood that Mary, too, was using senses other than the five normal ones to monitor Sly and how her body was reacting.