Guinea Pig: Devil's Experiment is a 1985 Japanese horror film and the first entry in the Guinea Pig series, notorious for its graphic and realistic-looking gore. Its reputation spread through horror fan communities and online video culture, where it became a shorthand reference for extreme cinema that is difficult to watch. Reaction clips like this one grew out of that reputation, as viewers recorded their own shock while watching it. The sound works alongside a sudden suspense cue in edits that build tension before revealing something disturbing.