The Master glanced briefly down at the tapping fingers, but forebore to comment. There were more interesting things to comment on.
He made a delicate face. "Oh, knives are so messy. I find the laser screwdriver so much neater. And so much more precision. It's an enticing idea, though.
"Unfortunately, not really practical. Killing Jack - however delicious it would be - isn't something we could really keep quiet. And if we couldn't be sure of being able to get away..."