Mistakes
When Marty is burning the almanac, during the lightening strike, the shadow of the post holding the hover-board off the ground is visible. - watch the hoverboard when the scene is illuminated by lightning strikes. The post holding up the hoverboard is also clearly visible when they pan around Marty as he is holding the burned rope from the Delorean. See more...
Trivia
The tunnel that Biff Tannen and Marty McFly both go through, is also the same tunnel seen in Who Framed Roger Rabbit. See more...
Movie Mistakes blog
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Back to the Future Part II (1989)
Directed by Robert Zemeckis, starring Christopher Lloyd, Elizabeth Shue, Lea Thompson, Michael J. Fox, Thomas F. Wilson (add more)