I didn't google it, but I once came across a video where a guy jumps in the water from a pier. Thing is, there was another pier there before the water, he stumbled, hit his head on the corner and then fell into the water. I don't know which was more disturbing: the image of his motionless body floating face down in the water which turned red around him, or the clip from the guy's surgery where his head was literally split open multiple centimeters wide.
Come to think of it, it might have been this very forum where I came across the video in question.
Another video I still can't understand why I watched was a video where a mexican cartel decapitates two men with a chainsaw. I turned it off about 3 seconds after first blood, but the image still lingers in my mind.
And one final shoutout to all you crazy people who want to see the sickest shit: type "Offended?" into google, and then press I'm Feeling Lucky. I once told my friend who has seen the sickest shit to do it, and even he couldn't take it. What you will see is basically a webpage filled with absolutely all fucked up, sickening, wrong, evil, revolting, vomit-inducing things you can imagine, and also the things you can't imagine.