Synthetic kryptonite laced with tobacco tar splits Superman in two: good Clark Kent and bad Man of Steel.

Vera Webster: I still don't understand why you can't balloon down like the rest of us.
Gus Gorman: I just don't believe a man can fly.
Gus Gorman: I don't want to go to jail because there are robbers and rapers and rapers who rape robbers.
Gus Gorman: [adding tar to make Kryptonite] What the hell? He ain't gonna smoke it.
Ross Webster: I ask you to kill Superman, and you're telling me you couldn't even do that one, simple thing.
Evil Superman: You always wanted to fly Kent. Now's your chance!
[Superman has just stopped a chemical fire]
Fire Chief: I tell you that man is a miracle.
Perry White: I don't understand you Olsen. A boring banquet and you bring me three thousand boring pictures. Yet Superman saves a man from drowning on 3rd Avenue this morning while you stand there watching the whole thing and you don't even bring me one picture.
Jimmy Olsen: Chief, I didn't have my camera with me.
Perry White: [while Jimmy mouths the words he knows by heart] A photographer *eats* with his camera. A photographer *sleeps* with his camera.
Lois Lane: I'm glad I'm a writer.
[last lines]
Pisa Vendor: Giorgio, per favore. Que grazie.
Perry White: I don't have to tell you, it isn't easy for me to lose one of my best reporters.
Clark Kent: Oh, that's okay.
Perry White: But you deserve the vacation, Lois.
Lois Lane: Thank you.
[Clark directs his sneeze at Ricky's bowling ball, giving him a strike and destroying the bowling pins]
Lana Lang: Gesundheit.
Clark Kent: Thank you.
Vera Webster: Activate circuits 29 through W7 and start full-power coordinates on exterior defensive systems.
Lorelei: In other words, push this red button.
Vera Webster: How did you know about that?
[first lines]
Unemployment Clerk: Next. Name?
Gus Gorman: Gus Gorman.
Vera Webster: If you don't mind, we're trying to hold a meeting here!
Lorelei: Why don't you hold your breath instead? Maybe you'll turn blue. Ha! Improvement.
Vera Webster: Pay attention, people, I'm about to take a human life!
Jimmy Olsen: Clark, I want you to keep these people distracted so they don't know what I'm doing.
Clark Kent: What are you doing?
Jimmy Olsen: What am I doing? Remember what the chief said? A photographer always goes after a story.
Clark Kent: That could be dangerous, Jimmy.
Jimmy Olsen: Danger? Goes with the territory, Mister Kent.
Gus Gorman: [to Superman] Hey, man!
Lorelei: That's his last name. He likes to be called Superman.
Gus Gorman: Superman's bad!
Ross Webster: What will it do?
Gus Gorman: Anything I tell it.
Ross Webster: What will it do for me?
Gus Gorman: For you, it will do anything you tell me to tell it to do for you.
Gus Gorman: You're hurting him. That's Kryptonite!
Ross Webster: Yes. This time we got it right.
Vera Webster: You're a genius. You've invented a machine that can find anybody's weak spot. Congratulations, old buddy. You'll go down in history as the man who killed Superman!
Ross Webster: Computers rule the world today. And the fellow that can fool the computers, can rule the world himself.
Ross Webster: You know a wise man once said, I think it was Attila the Hun, "It is not enough that I succeed, everyone else must fail."
Evil Superman: [after blowing acid on to his better half] What's 'a matter, Kent? Too hot for ya'? Come on chicken! You've been on my nerves for a long time!
Vera Webster: Don't call me "man."
White Coated Scientist: Hey. Here's that compound you ordered. Can't imagine what you want with it, but you've got it.
Gus Gorman: What the hell am I afraid for? I'm from Earth.
Evil Superman: Well I hope you don't expect me to save you, 'cause I don't do that anymore.
Lorelei: Don't worry about me. I'm long past savin'.
Ross Webster: My friend, you are yesterday. Whomever pulled off this caper, is tomorrow.
Ross Webster: I'll say he was.
Gus Gorman: I've been thinking I'm not making enough money for this gig.
Ross Webster: Gus, if there's anything I hate, it's greed.
Gus Gorman: Greed? Mrs. Ross, just a minute. Let me tell you something.
[goes down ski slope]
Gus Gorman: I can't ski!
Lorelei: [reading Immanuel Kant's "Critique of Pure Reason"] How can he say that Pure Categories have no objective meaning in Transcendental Logic? What about Synthetic Unity?
Lorelei: Thought you'd never get here.
Evil Superman: Well I hope you don't expect me to save you because I don't do that anymore.
Lorelei: Ha! Don't worry. I'm long past saving. Well. Don't let me keep you from anything.
Evil Superman: I'm not in a rush. What did you have in mind?
Lorelei: Lot's of things.
Evil Superman: Oh, yeah?
Lorelei: [Superman picks up Lorelei by the arm] Woo! If you'll do me one little favor first.
Evil Superman: What's that?
Lorelei: Well. See, there's this little boat, and its not going where it's supposed to go and...
[Superman flies out to the oil tanker ship at sea and punctures the ship's hull, making the oil spill out. Then as Superman returns to Lorelei's pad]
Lorelei: Hi.
[Superman slowly walks into Lorelei's room]
Lorelei: How about a little après-ski?
[as Superman walks closer to Lorelei,]
Lorelei: Champagne?
[Superman proceeds to make out with Lorelei]
Ross Webster: I can't have anyone with me... who isn't with me.
Ross Webster: Vera, get ahold of yourself. No one else ever will.
Evil Superman: [Blurts out, to the disgusted crowd after exiting the bar] What're ya looking at? Huh?
Clark Kent: I can give more than I take.
Ross Webster: I've got to get rid of him.
Vera Webster: How? Shoot him? You know about him and bullets.
Ross Webster: Never underestimate the power of computers.