- "I guess you guys aren't ready for that yet. But your kids are gonna love it."
If you click on the microphone in the Speakeasy, Marty will start to sing "Johnny B. Goode" on-stage, only to stop before the first lyric.
Behind the scenes
- "Johnny B. Goode" was actually composed and first performed by Chuck Berry in March 1958.
- Michael J. Fox's performance of the song is one of the signature moments of Back to the Future. Marty's singing was dubbed by Mark Campbell. Fox asked guitarist Paul Hanson to teach him the precise sequence of chords, so that it would appear that Marty's guitar playing would match with the soundtrack. However, guitarist Tim May, rather than Hanson, recorded the actual music. Hanson appeared on film as the bass guitarist for The Pinheads.
- Despite Marty's instructions, both Chuck Berry's original recording and the rendition heard in the film are actually played on a "B flat" blues scale, not "B". Nevertheless, Marty's fingers do appear to be playing the song on the "B" blues scale in the film (assuming the guitar is using standard tuning).
- On the commentary of the first film, Robert Zemeckis confirmed that the "Johnny B. Goode" scene was nearly cut from the finished film because according to him, it was the only place in the film where the storyline stopped for Michael J. Fox to do the performance. However, Arthur Schmidt, one of the editors of Back to the Future, suggested leaving the scene in for the preview screening of the film, and it was finally left in the finished film.