In the movie Full Metal Jacket, there is a scene where a soldier is trapped in an open area with buildings all around, and is slowly being shot to pieces by a sniper hiding in one of the buildings. Graphic close-ups of bullets impacting and blood spattering. The soldier screams like crazy. His comrades can't tell where the sniper is.

I'm not sure if you can call my reaction fear or revulsion or what, but it wasn't pleasant that's for sure.