When Red sprays Eric with the hose, the look on Topher Grace's face was genuine, as he didn't see it coming.
TV show announcer: "Coming up in the second half-hour of American Bandstand: Shields and Yarnell, Elton John and Kiki Dee.". American Bandstand was a long-running music program, hosted by Dick Clark, that started in 1957 and continued to 1987. Shields and Yarnell were mime artists popular in the mid-'70s who regularly appeared in "The Sonny & Cher Show" and eventually starred in their own short-lived show. Elton John and Kiki Dee would have been performing their 1976 hit "Don't Go Breaking My Heart".
At 3:16 into the show, as Jackie says, "Oh, my God! Donna, you have never asked me to go to the bathroom with you before!", Jackie's coat and chair fall over backward. The chair and coat reappear at 3:33.