The video for "Jeremy" can be equally disturbing, what with the way the video was shot, Eddie Vedder's creepy expression, and the video's premise and Downer Ending.
MTV decided to cut a certain scene from the video where Jeremy stands in front of the class, puts the gun in his mouth, and the class ends up coated in blood. With this (slightly confusing) scene cut, the ending becomes very vague; they show Jeremy with the gun, but they didn't show him put it in his mouth. Without prior knowledge of the story behind the song, and without watching the cut scene, the ending may make it look like Jeremy shot his classmates, which can be just as disturbing.
What makes this even scarier is that it was a true story.