Steven Stotch is at the aquatic center, but Butters isn't. The Broflovskis don't appear at all.
Kenny appears in swim trunks at the aquatic center, but doesn't say anything.
"The Woman In White" - a direct reference to the play of the same name by Andrew Lloyd Webber
You know, the audience members left their seats calmly and despite the water main Randy broke, the theatre didn't look flooded. And yet Larry died drowning in the theatre.