"Oh, it's your first contact!" the Master says gleefully. "What a treat! We should shake hands; then when you finally rid yourself of this alternate dimension business you can tell all your friends." Just push –shove, heh– his safety boundary and see what he does with it.

"Frequently," he tells Sam, in answer to how often –isn't that strange– he's on Earth. "Always something going on here; you attract a lot of trouble for such an underdeveloped species." On the word 'trouble' his expression goes mischievous in an overdone manner.