About 18 years ago, some guy at work was laughing at a video of someone being blown to pieces by an explosive device. People kept walking by his desk and laughing, I suppose because it looked so cartoonish that it felt more like looney tunes than real life.
As an experiment, I showed the same video to my 85-year old grandmother, and she cried out in horror and prayed for the people in the video for a solid hour afterwards.