Flanders: I think we hit something.
Homer: I hope it's Flanders.
Bart: Dad, Dad, we did something terrible!
Homer: Did you wreck the car?
Bart and Lisa: No!
Homer: Did you raise the dead?
Bart and Lisa: Yes!
Homer: But the car's ok?
Bart and Lisa: Uh-huh.
Homer: Ok then.
Homer: Marge, I agree with you - in theory. In theory, Communism works. In theory.
Homer: Oh, no! Lisa's dead! And nothing will ever bring her back! (slyly) Unless...
Lisa: Dad, I'm not dead.
Homer: Oh, praise God! You're alive! (slyly) Unless...
* Dr Hibbert: You’ll go through five distinct stages; first is denial.
Homer: No way ‘cause I’m not going to die.
Dr Hibbert: Second is anger.
Homer: (angrily) Why you little...
Dr Hibbert: Then bargaining...
Homer: (waving some cash in front of Hibbert’s face) Doc, if you get me out of this I’ll make it worth your while.
Dr Hibbert: ...depression...
Homer: (sadly) Oh no, I’m going to die.
Dr Hibbert: ...then, finally, acceptance.
Homer: Well, we all gotta go some time.
Dr Hibbert: Mr. Simpson, you're making remarkable progress.
Homer: My ears are burning.
Lisa: Oh Dad, we're not talking about you.
Homer: No, my ears are really burning. I wanted to see inside, so I lit a Q-tip.
Of course, there's the classic:
Homer: (in fake voice) Hello, My name is Mr. Burns. I believe you have a package for me.
Clerk: Okay, Mr. Burns... what's your first name?
Homer: I... don't know...