I have found the missing line about Alice being stuck in the sleeping bag. It's from the episode "Our Son, the Man", which deals with Greg's wanting to be treated like an adult, and his (temporary) move into Mike's den. In the B-plot, the family is planning a trip to Mount Claymore, and Marcia, Cindy, and Alice are in the backyard airing out the sleeping bags. Alice gets in one of the bags to see if it will be warm enough for the mountains, and Cindy tells her that it's that one where the zipper always sticks. Alice, of course, gets stuck, and Cindy suggests, "Maybe we can squirt her out, like toothpaste." Finally, Greg comes along and gets the zipper unstuck, because "it took a man" to do it.

I knew I had heard that line recently. I have this episode on Columbia House tape, so I'm guessing this scene is edited out of the syndicated and N@N versions.

That scene had to have been cut out of syndication because I've never seen that scene before.