- Fanon: While the princesses are pretty clearly intended to be sisters, after the release of Face the Music several fans took advantage of it never being explicitly stated to enable shipping of their daughters Billie and Thea.
- "Funny Aneurysm" Moment: There is a bit at the end where Billy the Kid shoots one of the lights in the school auditorium. This is a bit problematic to watch now that school shootings are sadly a major issue. Let it suffice to say that a modern school audience wouldn't react with the awe that the audience did in this scene.
- Hilarious in Hindsight:
- A note from the future warns Bill and Ted to duck behind an office desk just as someone stands up and would have spotted them.
- Rufus' final line, a desperate "They do get better!" directly to the camera. Face the Music would later reveal all that's actually known about how the 26th century's perfect society was formed is the names Preston and Logan, and there are several theories about how it actually happened, making this come off as Rufus hearing how bad they are for the first time and struggling to justify his own theory.
- Bill was absolutely right - they never would be a triumphant band without Eddie Van Halen.
- In the mall scene where the historical figures are running around causing mischief, many of the people who encounter them think they're just plain insane. Nowadays, the historical figures would probably just be mistaken for really enthusiastic cosplayers.
- One-Scene Wonder: "San Dimas High School Football Rules!"
- The Problem with Licensed Games:
- One of many films that got a Nintendo Entertainment System game courtesy of infamous publishers LJN Toys. This one is considered to be particularly wretched, however, with The Angry Video Game Nerd (who has played far more of these games than should be considered healthy) even going so far as to consider it the absolute worst game ever released by LJN.
- There was also a PC game that involved several puzzles, fetch quests, and other mini-games as a means of recruiting even more historical figures than in the movie, but it suffered from miserable hit detection and required a "phone book" game manual to get around Copy Protection. While better than the NES game, it can be regarded as So Okay, It's Average.
- Values Dissonance: Bill and Ted calling each other "fag" after a hug is quite inappropriate for modern audiences in an otherwise lighthearted, kid-friendly comedy (especially with the f-bomb coming from the story's heroes).
YMMV / Bill & Ted's Excellent Adventure