That might come later, when his own senses are heightened - most particularly when it comes to blood, but in general as well. As it is now, he can only blink in confusion at the other man, shaking his head. "I'm sorry, I can't smell a thing, apart from maybe the hot dog vendor over there." But he's tense now, strangely tense and alert, and he finds that he does indeed believe that Lyall can feel something. "Where do you think it's coming from?"