Trivia: In an interview, the director stated that hoverboards were real, but they weren't on the market because parents didn't like the idea of floating children. He said this as a joke, but this didn't stop mass hysteria as thousands of kids went from store to store looking for hoverboards.
Trivia: When Doc and Marty arrive back in 1955 to stop the handover of the Almanac, there are 4 versions of the time machine in the area at that time - the one they just arrived in from the alternate 1985, the one Marty arrived in from the original 1985 in the first film, the one Biff arrived in from 2015 in the second film, and the one Doc buried in 1885 in the third film.
Trivia: When Marty is waiting for Griff in the cafe he plays a videogame with two boys. One of the boys is Elijah Wood at age 7. (01:14:55)
Trivia: The tunnel that Biff Tannen and Marty McFly both go through, is also the same tunnel seen in Who Framed Roger Rabbit.
Trivia: Towards the beginning of the movie there is a close-up of the front window of Blast From the Past. If you look closely in the upper left hand corner you can see the jacket that Marty wore in the first movie. Also if you look on the right hand side you can see a Who Framed Roger Rabbit doll, another Robert Zemeckis film also starring Christopher Lloyd. There's also a Jaws video game. (00:12:28)
Trivia: Many people think Crispin Glover reprised his role as George McFly for part II, but it's a different actor who had facial prosthetics applied to look like Glover. These prosthetics were made from actual molds of Glover's face left over from part I. Glover never authorized his likeness to be used and sued. The Screen Actors Guild now has laws against "unauthorized mimicking" of other actors as a result of the lawsuit. Crispin Glover is listed in the credit for part II only as "archive footage"
Trivia: This film was shot simultaneously with Part III. In the five years since the original film was made, Michael J. Fox had forgotten how to ride a skateboard, and needed to relearn the skill.
Trivia: When Marty is in the Cafe 80's, when he is about to hit Griff or get hit by Griff, you can see a row of TVs behind them (showing the Smurfs, etc). One of the TVs is showing Family Ties, the TV show that made Michael J. Fox famous.
Trivia: Much of Griff's outfit, particularly his boots are bits of Klingon costumes from Star Trek: The Next Generation.
Trivia: In the scene where the Doc of the future, hands the 3/4 wrench to the Doc of 1955, the Doc of 1955 is wearing the same two watches that the other Doc wears throughout the entire movie. This could actually happen if the Doc of 1955 kept the same two watches to wear throughout his life. It's still worth a look. (01:13:53)
Trivia: According to Robert Zemeckis, the kitchen scene with Michael J. Fox playing three characters simultaneously (middle-aged Marty McFly, his goofy son and bubble-headed daughter all sitting at the same table) was a nightmare to shoot. The characters required individual matte shots that were later spliced together into one scene, requiring many takes; so every visible object in the kitchen background had to remain perfectly stationary and consistent over several days of filming. Thinking ahead, Zemeckis ordered his property crew to hot-glue every single background object in the kitchen in-place, to prevent accidental movement. However, when they were well into filming the tricky scene, the studio was struck by an earthquake, which essentially destroyed the kitchen set, hot glue and all, requiring a rebuild and complete re-shoot.
Trivia: In Back to the Future II, Biff is watching the Clint Eastwood movie A Fistful of Dollars. If you have seen this, you know that at the end, Clint uses a piece of metal to stop all the shots from Ramon. In Back to the Future Part III Marty calls himself Clint Eastwood and at the end, he uses a piece of metal to keep himself from dying. (00:55:30)
Trivia: The voice of Biff's grandmother was provided by Thomas F. Wilson.
Suggested correction: According to The IMDB website, Charles Fleischer who played Terry the Tow Truck Driver and the old man taking donations in 2015, provided the voice of Gertrude Tannen.
And other sites list Wilson as the voice of Gertrude. Neither men are credited for the role and I have yet to see any site list a source for the information.
Https://www.imdb.com/name/nm0281486/otherworks.
IMDB is not considered a good source. Plus, on that site the information is given as trivia without a source, any crackpot could have claimed that.
Well until you can show me a confirmed source stating it was anyone else, my correction stands.
But IMDB isn't a confirmed source. Here's a site that lists Wilson as the voice actor, so by your logic the trivia entry stands. https://backtothefuture.fandom.com/wiki/Gertrude_Tannen.
On the audio commentary it is stated that the voice of Grandma Tannen is Fleischer. This is stated right after we hear "her" voice when the outside of her house is being shown.
Trivia: When Marty discovers that he is in an alternate Hill Valley, there was going to be a scene with him discovering that his sister Linda was a prostitute and his brother Dave a homeless drunk living on the streets. These scenes were scrapped as Wendie Jo Sperber, who played Linda, was pregnant at the time.
Suggested correction: Very unlikely for a family film, and needs to be supported by some evidence such as a published interview with a film principal. This is a ridiculous entry and should be removed.
There was, in fact, a deleted scene in which Marty comes across Dave, who has since become an alcoholic, in the town square. While it is true that Wendie Jo Sperber was pregnant and thus unavailable at the time the film was made, I've never heard of anything scripted about Linda having turned to prostitution.
If you have the DVD or the Blu-Ray, watch the movie with the Trivia Track on. It will confirm that Wendie was originally supposed to appear as her character Linda who had become a prostitute.