1. 2001: A Space Odyssey
    This has quickly become my favorite movie of all time. The moon base scene in "Act II" and all of "Act IV" in the bedroom is so scary to me. I've had nightmares about the monolith. Kubrick nightmares are the best though. I guess there's no reason to make it anything other than G but it's just so suspenseful and spooky.
  2. Dumbo
    I'm so emotionally scarred from this movie I can't even talk about it.
    Suggested by @jessnobs