When I was about 8 there was a kids' show (i don't know what it was called, it might have been something about a magic box, or maybe I'm mixing it up). Anyway, in the intro there is a box that is opened and all sorts of images comes out, one of a sheltie. The sheltie is beautiful but it was so eerie how the dog came out of the box and the the mood was creepy, and for some reason that I can't quite explain, I found it eerie.
When I was 12 I watched "the winds or war" (or was it "war and remembrance"?). In this particular episode it showed the concentration camp Natalie was in. In one scene there was a woman under a train wagon with this big-eyed glassy stare. That really freaked me out. The following night I had a nightmare about those eyes.
Nature shows scare me witless when they focus on how wildlife are disappearing, how bad the climate and plastic pollution is, and how bad the human overpopulation really is and gets worse every single day.