Season 4, Episode 5: "The Wallet"

Boy, you got a lot of stuff here.

-Dad, what are you doing? -Nothing, nothing.

Leave it. What about your back?

-Morty, what are you doing? -All right, all right.

You come here to see a back specialist...

...and you're lifting heavy suitcases.

Hey, Mr. Kramer.

-Hey, Mrs. Seinfeld. -Kramer, hi.