Side Out is a 1990 American comedy-drama sports film about a beach volleyball competition, featuring C. Thomas Howell, Peter Horton, Harley Jane Kozak and Courtney Thorne-Smith. It was the last film from Aurora Productions due to many flops. The film was directed by Peter Israelson.

Many professional beach volleyball players appeared in the movie, such as 5-time world champion Randy Stoklos (who had the main speaking role of all the players as Rollo Vincent); Sinjin Smith (as Stoklos' playing partner/character Billy Cross) who won 5 world championships with Stoklos and was the 1st player to reach 100 wins; Olympic gold medalist Kent Steffes; Steve Timmons, who won 2 Olympic gold medals in indoor volleyball; Mike Dodd, 5-time Manhattan Beach Open champion, 75 pro wins and an Olympic silver medal; Tim Hovland, 3-time All-American at USC and won $1 million in pro prize money; also Steve Obradovich (who also had a generous speaking part), Craig Moothart, Brent Frohoff, Ricci Luyties, Roger Clark, Pono Ma'a, Wally Goodrich, and Rudy Dvorak.

The term “side-out” used to refer to an obsolete scoring rule in volleyball called "side-out scoring" under which the winning point could only be scored by the serving team. A side-out is now simply defined as when the receiving team earns the right to serve by winning a point. Rally scoring became the dominant scoring method as of 1999, which gives a point to whichever team wins a rally, whether serving or not. This method allowed for a more predictable match length and increased fan interest and shorter games.