The scariest one is one of the japanese horror movies (i.e. the Grudge). I didnt know about it when I was like four years old and I didn't got scared (plus I stood near the TV) lol. But now Im scared now..
The saddest one is... well i don't know. I guess its just Flan's history of being locked in the basement of the SDM and never got to see the outside world. Though that is fiction, it brings me sadness.
But all I know, it will hurt me and someone else related to the incident.
Note to mention that it fit with this song lol.
http://www.youtube.com/watch?v=5Zfy6cUo1wM