In "Bill & Ted's Excellent Adventure," the famous line is "Be excellent to each other." This phrase embodies the film's central theme of friendship and positivity. It reflects the laid-back, good-natured philosophy of the main characters, Bill S. Preston, Esq., and Ted "Theodore" Logan, as they navigate their time-traveling adventures. The line is often quoted and has become emblematic of the film's spirit and message about kindness and camaraderie.

As of October 2023, there are three movies in the "Bill & Ted" franchise: 1. "Bill & Ted's Excellent Adventure" (1989) - The original film where Bill and Ted travel through time to assemble historical figures for their history presentation. 2. "Bill & Ted's Bogus Journey" (1991) - The sequel where they face off against evil robot versions of themselves and confront Death. 3. "Bill & Ted Face the Music" (2020) - The third installment, where they embark on a new adventure to write a song that will save humanity.

"Bill & Ted's Excellent Adventure" was primarily filmed in various locations in California. Key filming sites included San Dimas, where the story is set, as well as Los Angeles. Notable locations included the San Dimas High School, which was actually filmed at the local high school, and various scenes shot around the Los Angeles area, including the iconic phone booth scenes. The film was released in 1989 and has since become a cult classic.

George Carlin played the character Rufus in "Bill & Ted's Excellent Adventure" because he was drawn to the film's unique blend of humor and philosophy. He appreciated its positive message about friendship and the importance of learning from history. Carlin's comedic style and persona added depth to the character, making Rufus a memorable guide for the time-traveling protagonists. The role allowed him to engage with a younger audience while also bringing his signature wit to the film, contributing to its cult status.