Most disturbing scene in a movie

[codewarrior]

And by disturbing, I don't necessarily mean graphic. A scene that just hits you in the guts and just bothers you.

For me, it's the scene near the beginning of Regarding Henry in the convenience store, where Harrison Ford gets shot smack in the middle of the forehead, pauses, utters "I just wanted a pack of cigarettes" and then collapses. It almost seemed too real.