The Fire Season 5, Episode 20

Jerry

...that's why men hunt and women nest.

Toby

BOO! BOO! Hiss! Boo! (Toby's obnoxious behavior causes Jerry to completely lose his place and mess up his act.)

Jerry

Yea, ya, so...anyway what was I talking about.

Kramer

Hey.

Jerry

Hey, what's the deal? What was goin' on there? I invite you down here, I have an important show, and she heckles me?!