The Master whips his head around to locate the source of that wretched laughter, and then realizes it can in fact get much, much worse.

"Well, if it isn't Saint Martha Jones," he sneers. It was bad enough she saw him as a human, saw him defeated by the Doctor and a girl. This is just one more indignity. Oh, he'd choke the life out of her... if he could get these mitts off. Pulling on them seems to do absolutely no good.