Devika tilted her head, watching calmly. "Well, it certainly looks scared." She took several steps back to make sure she wasn't ruining his tests. Animals did not like her at all, and she couldn't be sure that the rat was doubly scared because she was in the room. "If I could ask a question, Nicholas... How do you know the rats aren't responding to the mask, instead of the gas? I mean, it's kind of freaky all on it's own. Maybe you need to do some test runs without the mask, to make sure you're not adding in an extra variable or something."