A form of Dramatic Irony. A horrific event is understated because the narrator is very young, very naive or is intellectually disabled in some way, and doesn't really understand what took place. Alternatively, it may be obvious to the audience that something very bad has happened/is about to happen, but the narrator/character lacks the mental capacity to realize this and interprets it in a more "innocent" light. Compare/contrast Troubling Unchildlike Behavior. Related to Unreliable Narrator. Examples of Innocent Inaccurate include: