Films with Bizarre MPAA Rating Reasons

When the MPAA gives a film a PG, PG-13, R, or NC-17 rating they like to say why. Usually it's pretty ordinary stuff: "language, sexual content" and the like.

...Sometimes, though, it's hilarious.

My initial source is this: thoughtcatalog.com/ted-pillow/2013/02/the-50-most-bizarrely-funny-movie-ratings/ Since then, I've added in many others I've noticed.
Suggestions are welcome!

Read notes
  • Twister
  • Congo
  • Volcano
  • Fly Away Home
  • Son of Rambow
  • Josh and S.A.M.
  • So I Married an Axe Murderer
  • Ratter
  • In the Company of Men
  • Class of Nuke 'Em High 2: Subhumanoid Meltdown
  • Class of Nuke 'Em High 3: The Good, the Bad and the Subhumanoid
  • Manhattan Murder Mystery
  • Charlie and the Chocolate Factory
  • Fifty Shades of Grey
  • Beverly Hills Ninja
  • A Family Thing
  • Superman/Batman: Public Enemies
  • Rollerball
  • Matilda
  • Little Giants
  • For the Moment
  • Mother's Boys
  • Spawn
  • Donkey Punch
  • Bats
  • War of the Buttons
  • The Dentist
  • 3 Ninjas Knuckle Up
  • To Wong Foo, Thanks for Everything! Julie Newmar
  • Trainspotting
  • Fear and Loathing in Las Vegas
  • Fight Club
  • Gummo
  • Jefferson in Paris
  • King Leopold's Ghost
  • The Indian in the Cupboard
  • Dead Boyz Can't Fly
  • AVP: Alien vs. Predator
  • Texas Chainsaw Massacre: The Next Generation
  • Alice in Wonderland
  • Pink Flamingos
  • Team America: World Police
  • Secretary
  • The Fugitive
  • Bushwhacked
  • The Skateboard Kid II
  • The Brady Bunch Movie
  • Wayne's World 2
  • The Monuments Men
  • Magic in the Moonlight
  • Se7en
  • The City of Lost Children
  • The Danish Girl
  • Truth
  • Rodeo Girl
  • Braindead
  • Grumpier Old Men
  • Cutie and the Boxer
  • Zoolander 2
  • The Lady in the Van
  • Risen
  • Son of God
  • Victor Frankenstein
  • Natural Born Pranksters
  • The 5th Wave
  • The Letters
  • Walt Before Mickey
  • Manglehorn
  • The Longest Ride
  • Blues Brothers 2000
  • Ballerina
  • Dunkirk
  • Hacksaw Ridge
  • The Case for Christ
  • Raw
  • Doctor Strange
  • The Lennon Report
  • Priceless
  • Milton's Secret
  • Babies
  • Extraordinary Measures
  • Knucklehead
  • Altitude
  • Mortal Engines
  • Suspiria
  • The House with a Clock in Its Walls
  • Mountain
  • The Greatest Showman
  • Peterloo
  • Eurovision Song Contest: The Story of Fire Saga