As Christine wraps up the show on the Link Set, Lisa as Wonder Woman "wonders" why they haven't got Christine wet yet. But Christine DID get wet - in a porch scene with Doug as a trick-or-treater visiting homes three months before Halloween. Since this scene has nothing to do with heroes, it could have been filmed for another episode (but not used) and was, therefore, not part of the planned script (although what episode it might have been planned for is not apparent).
When the Announcer (Les Lye) names the production upon a series of familiar and classic utterances associated with comic book heroes, "through the Bat Hole" (if in association with Batman) is not accurate. It should be "to the Bat Cave" or "to the Bat Poles" to be correct. It may have been deliberately misquoted in order to come craftily close to saying "through the butt hole" without getting censored. (After all, these are the same people who once tried to name a character "R. Sole" but didn't get away with it.)