Madman's Knowledge is a consumable item in Bloodborne, the 2015 action role playing game by FromSoftware for PlayStation 4. Using the skull grants Insight, called Discernimento in Portuguese, a stat that changes what hunters can see and hear as their understanding of the cosmos grows. Clips of the moment spread through gameplay videos, lore discussions and fan edits, where the sound became shorthand for gaining cursed knowledge. It remains popular with editors who need an instant, recognisable cue for revelation, madness and cosmic horror in a single beat.