After the opening titles, the gang is at a beach volleyball game. The camera pans along with the guy in the water bottle costume, and in the background we see the teenage Pebbles Flintstone and Bam-Bam Rubble from "The Pebbles and Bam-Bam Show". She's the redhead in the red bikini with her hair up, he's the guy with the white hair next to her wearing the yellow and black trunks.