Dag and Norb find a brand new water park, so they build their own ride.
- The wording on the billboard at the beginning of the episode reads "FUN SUN LIMBO BEACH PARTIES". 
- The episode title is a spoof of the chemical formula for water: H2O.
- Richard Horvitz as Daggett
- Nick Bakay as Norbert
- Kevin Schon as Male Patron, Man #2
- Merrill Ward as P.A. Announcer, Man #1
- Joyce Kurtz as Angry Kid, Woman's Voice
- Gina Belafonte as Angry Female, Female Patron
- Singers: Charlie Brissette
"The Bing That Wouldn't Leave"