Psycho
http://mentalfloss.com/article/68248/14-crazy-facts-about-psycho
https://en.wikipedia.org/wiki/Psycho_(1960_film)

Poltergeist
https://en.wikipedia.org/wiki/Poltergeist_(1982_film)
https://www.snopes.com/were-real-skeletons-used-in-the-making-of-poltergeist/

The Departed
https://www.telegraph.co.uk/culture/film/3655460/The-day-Mad-Jack-drew-a-gun-on-set.html
http://www.news.com.au/entertainment/movies/the-huge-film-martin-scorsese-found-highly-unpleasant-to-make/news-story/943f2f93cb39cb8a65f9a01b9b60cd83

The Conqueror
https://en.wikipedia.org/wiki/The_Conqueror_(film)
http://www.imdb.com/title/tt0049092/trivia

The Blob
https://io9.gizmodo.com/the-true-story-behind-the-blob-1623120977
http://www.the13thfloor.tv/2015/10/21/the-movie-the-blob-is-based-on-a-supposedly-true-event-read-the-real-story-behind-this-classic-film/

Alien
https://en.wikipedia.org/wiki/Alien_(creature_in_Alien_franchise)
https://www.wired.com/2016/09/h-r-giger-made-aliens-monster-beautiful-terrifying/
https://en.wikipedia.org/wiki/Alien_(film)

Rocky IV
https://en.wikipedia.org/wiki/Rocky_IV
https://www.muscleandfitness.com/athletes-celebrities/news/sylvester-stallone-lundgren-put-me-hospital-during-rocky-iv

Batman Returns
https://www.youtube.com/watch?v=WyUx73RJ51o
https://capedcrusades.com/2014/12/29/sean-young-really-wanted-tim-burtons-batman/

Halloween
http://www.startrek.com/article/was-michael-myers-halloween-mask-william-shatners-face
https://en.wikipedia.org/wiki/Halloween_(1978_film)

The Wizard of Oz
https://parade.com/329429/linzlowe/75-weird-wonderful-facts-about-the-wizard-of-oz/
https://en.wikipedia.org/wiki/The_Wizard_of_Oz_(1939_film)