Robin: "You can't get away from Batman that easy!"
Batman: "Good grammar is essential, Robin."
Robin: "Thank you."
Batman: "You're welcome."
I'm bringing you this nugget from a site full of quotes where Batman lectures Robin. I particularly enjoy the one above as I particularly enjoy good grammar.
Robin: "Where'd you get a live fish, Batman?"
Batman: "The true crimefighter always carries everything he needs in his utility belt, Robin."
Robin: "Let's go!"
Batman: "Not you, Robin. They have strict licensing laws in this country. A boy of your age is not allowed in a drinking tavern."
Robin: "If we close our eyes, we can't see anything."
Batman: "A sound observation, Robin."
Batman: "Robin, you haven't fastened your safety bat-belt."
Robin: "We're only going a couple of blocks."
Batman: "It won't be long until you are old enough to get a driver's license, Robin, and you'll be able to drive the Batmobile and other vehicles. Remember, motorist safety."
Robin: "Gosh, Batman, when you put it that way.."
(in Batmobile, on golf course)
Robin: "Let's get going and make an emergency bat-turn!"
Batman: "Not this time, old chum. Have to think of the golfers. The retro-rockets would burn up the course for a hundred yards."
Robin, looking at Batgirl: "You know something, Batman?"
Batman: "What's that, Robin?"
Robin: "She looks very pretty when she's asleep."
Batman: "I thought you might eventually notice that. That single statement indicates to me the first oncoming thrust of manhood, old chum."