Is there an L&S episode where one gets hysterical, and the other has to slap her to snap her out of it?

I was just watching the Dyke van Dyke Show episode "Long Night's Journey into Day," and had a feeling Laura and Millie were acting like Laverne & Shirley. Then it turned out to be a Garry Marshall-Jerry Belson written episode.

S2E3, Bachelor Mothers. Shirley gets hysterical, slaps Laverne even though Laverne isn't hysterical.