You probably noticed there were no shocking horror movies on this list. That's because horror films are meant to be shocking and would therefore fall into a category of their own. That being said, you should also know that Stoker was an odd film to begin with. It's dark and deep, with many levels of symbolism and subtext. One scene in particular has been called the most disturbing of 2013. A young girl is being raped in the woods by a young boy she was fooling around with. Her uncle shows up and kills the boy while he is in the middle of raping her. They both bury the body. The next scene then shows the girl masturbating in the shower to her uncle killing the boy.
Nothing is more disturbing than a teen girl masturbating to her uncle killing someone who is raping her. And that earns the #1 slot for most shocking movie moment of 2013.