A challenge!
How about when Rimmer is giving Kryten his Starbug driving test:
RIMMER: Stopping distances. You're traveling half the speed of light, what is the stopping distance?
KRYTEN: Four years, three months.
RIMMER: And the thinking time?
KRYTEN: A fortnight.
Or:
CAT: (sitting next to LISTER) What're you watching?
LISTER: Ah, just a vid. This is a classic, man!
CAT: What is it?
LISTER: Tales of the Riverbank: The Next Generation.
Or:
RIMMER: You call this happiness? Surrounded by toadying lackeys and paid sycophants? Living with a love-goddess sex-bomb model megastar? You call this contentment? You know, I stand here now and I look at the two of us, and I ask one simple question: Who is the rich man? You, with your fifty-eight houses, your private island in the Bahamas, your multi-billion pound business empire; or me, with... with... with what I've got. (Pause) It's you isn't it?
Or:
RIMMER: Step up to red alert!
KRYTEN: Sir, are you absolutely sure? It does mean changing the bulb.