In Cheers season 5 episode 1, Diane refuses Sam's marriage proposal. She explains why, and Sam immediately takes on a different speech pattern and has a small monologue about 15 minutes in:
Sam: Did you notice that?
Diane: Notice what?
Same: Everything just got calm.
Diane: I don't notice any difference.
Sam: Oh, yes, yes. There's a difference in everything. The whole world just changed for me. Oh! Look! The stars are new. The moon is new. Sam Malone is new, and I like him. And I like them, and they like me. And none of us like you.
The full script can be found here.
I couldn't find a clip in which he spoke this, but I didn't understand why this occurred and why it was funny (the laugh track plays at the end of this bit). English isn't my first language, so I figured there may have been some reference I was missing. Was this scene referencing something else, or were they just trying to portray Sam's incredulity and general animosity towards the situation?