17. Doc’s shirt in BTTF 2 features trains and horses and cowboys, a clear foreshadowing of what’s to come in the final installment.
18. There were only around 9,000 DeLorean cars ever made, according to the Discovery Channel website.
19. Back to the Future Part II used an effect called “vista glide” during scenes where the same characters, from different times in history, converse with themselves.