[Sarcasm, yes, but did you really expect anything else...]
Oh, nope, don't get all sappy on me now, I was just-- it was a legitimate concern, okay, after all the stunts you've pulled! Anyone would want to make sure we don't have another isolation incident on our hands. [He. does not handle thanks well, especially when he's trying to pretend to not be as concerned as he is. Which he promptly ruins by:]
... Just. Take it easy, okay? Don't push yourself. [He may or may not be echoing Porthos here.]