His optics flare slightly at the mention of First Aid, but his forces himself to stay put and avert his gaze from Ratchet. "Is he now?" he asks, unable to keep a dry, venomous sort of amusement from his voice. "Well, since he seemed more than willing to shoot me without provocation the first time, there's no need for the threat. You'd be surprised how little of a threat you can be without a head."