There's no going back after this list.
Toy Story:
Buzz Lightyear spends the movie believing he's not a toy, but he still freezes whenever people are around. What do you really believe, Buzz?
Via: themoviedb.org
Back To The Future:
Why doesn't Marty's mom recognize her son as the guy who... you know... she tried to sleep with years before. I feel like it would pretty pretty hard to forget someone who came into your life for a week and completely changed it.
Source: andrewsidea.files.wordpress.com
Waterworld:
Despite paper being the most valuable resource, the characters smoke cigarettes, which we can only assume are rolled with paper, the whole movie. Also, if almost the entire Earth is water, why is everyone so damn dirty?
The Santa Clause:
The parents in the movie don't believe in Santa... so where do they think the gifts under their trees come from each year?