Five minutes earlier, after Lyle had "disappeared", he had simply been moving too fast for the Were's eyes to follow. He didn't have the kind of ability that allowed him to disappear. Instead, he simply flitted quickly and directly entered Andreas' line of vision, stopping where he needed to pass to get toward the girls.
Andreas skidded to a stop. He gave a guttural laugh. "Are you going to stop me? Can you even stop me?" he asked.