George's mother throws her back out when she falls down after catching him doing "you know." When George says he'll never do it again, Jerry challenges him to a contest of self-denial, when he accepts, Elaine and Kramer want in on the action, or rather the lack of it.
Elenco: Jerry Seinfeld , Jason Alexander , Michael Richards , Julia Louis-Dreyfus , Liz Sheridan , Wayne Knight , Barney Martin , Estelle Harris , Heidi Swedberg , Larry David , Spike Feresten , Ruth Cohen , Jerry Stiller .