I think of an Epiphany as a "Eureka Moment" as in a goldminer crying out, "Eureka!" upon discovering a vein of gold (I'm a native Californian (and former resident of Eureka), so that example comes readily to mind).
What about the opposite, though - an "Oh, No!" moment? Such as, "What I thought was gold turned out to be iron pyrite."?
Is there a word for it - an Apiphany? Antipiphany? Malpiphany*? Or...???
- Since "epiphany" seems to refer to a good sound (epiphone), would the opposite be a bad sound?