Walking Dead will make you feel icky when you watch the things the humans trying to survive will do to each other. Some of the coldest shit you will see in any movie or TV show. When violence is done in a certain way where they get the tone right, it can be difficult to watch -- even if it's not as gory as some other stuff you've seen.
This scene from Munich is a good example. Steven Spielberg gets it. Just raw, brutal unglamorized violence. There's lots of scenes like this on Walking Dead.
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