There are many scenes from many movies that have disturbed me.. one of the worst was in the movie "The Departed". I'm mentioning this because it's somewhat 'unique'.
In "The Departed" they show the assassination of a young couple on a beach. Very realistic in how it was filmed.. but here's what got me about that scene:
I don't think, (don't remember exactly), the two characters assassinated were in that movie other than the scene where they got shot. No names. Just a brief flashback to them being shot, we the viewers had no idea who they were. The scene was meant to show the horror of the regime Jack Nicholson's character ran... and it worked, from that perspective... but it was just so casually depicted that to me it simply represented how casually Hollywood can display the loss of human life.
It was like, "two young people die needlessly, ah well, moving on".
Tough topic to explain... 'reality' isn't really the right word here except in explaining 'how' it was filmed.... it's the disregard or nonchalance regarding the loss of human life that disturbs me.