This exchange in "The Doctor Dances" is hilarious enough on its own:
JACK: Who has a sonic screwdriver?
DOCTOR: I do!
JACK: Who looks at a screwdriver and thinks "oohoo, this could be a little more sonic"?
DOCTOR: What, you've never been bored? Never had a long night? Never had a lot of cabinets to put up?
And then with added details from "A Christmas Carol," I'm laughing even harder (because of course he would never admit this to Captain Jack 😂):
KAZRAN: Doctor! I, er, I think she's [Abigail's] going to kiss me.
DOCTOR: Yeah, I think you're right.
KAZRAN: I've never kissed anyone before. What do I do?
DOCTOR [puts arm around Kazran's shoulder]: Well...try and be all nervous and rubbish and a bit shaky.
KAZRAN: Why?
DOCTOR: Because you're gonna be like that anyway. Might as well make it part of the plan, then it'll feel on purpose. Off you go, then!
KAZRAN: What, now? I kiss her now?
DOCTOR: Kazran, it's this or go to your room and design a new kind of screwdriver. Don't make my mistakes. Now, go!
