The Power of Love.... is a curious thing.
https://www.youtube.com/watch?v=-NMph943tsw
But of course this video is from the first film: Back to the Future (1985). Although only the first film was released in 1985, that year is a central point throughout the trilogy, as seen as the "present year" of the sequels released in 1989 and 1990.
In the second film, a direct continuation, the first part of the film, and one of the most iconic parts of the trilogy, is the part where they go to the year 2015. Specifically October 21, 2015. Another important year in the trilogy is 1955, also seen in all 3 films... but of course at the time, no one had the hindsight that we have in 2015.
Some of the most iconic aspects of the representation of 2015 include the flying car, as seen in what it did to the technology of the DeLorean car, as well as the iconic hoverboards.
I must admit that this is the part of the trilogy where it's probably best not to think to much about the logic...
I must admit, when I was a kid and first saw this (I actually saw Part 2 before Part 1) I didn't understand the concept of the "future" or of years. Because of this film, I just thought that "The Future" was some type of parallel world with flying cars.
Here's a video where teens react.
https://www.youtube.com/watch?v=Hgkx9JAON-I
and this (Christopher Lloyd and Michael J. Fox talk about 2015)
https://www.youtube.com/watch?v=1twReDT0y3k
