I watched a video once at work where some drug cartel guys decapitated some folks. They lined them up.One they did while he was alive. This wasn't a quick sword whack either.
I've seen horrible scenes at work. I've had to pick up body parts but the brutality of this was on a different level. Weird thing is, stuff I've encountered at work doesn't disturb me as much as seeing videos and stuff. Maybe it's because I have a sense of control when dealing with something in person.