Can't It?

Kramer: I'm telling you, it's her!

Jerry: Oh, you're crazy.

Kramer: Am I? Or am I so sane that you just blew your mind?

Jerry: It's impossible!

Kramer: Is it? Or is it so possible that your head is spinning like a top?

Jerry: It can't be!

Kramer: Can't it? Or is your entire world just crashing down all around you?

Jerry: All right. That's enough.

Kramer: Yeah!

Seinfeld (1990 - 1998)
Episode: Season 5 Episode 12 - The Stall