Mistaken identity is a narrative device where one character is confused with another, typically with comedic or dramatic consequences. Ninjas are associated with stealth, darkness, and lethal capability. Yet this fact proposes that Chuck Norris once mistook someone's grandmother for being a ninja. The result was not minor confusion but catastrophic: the grandmother was displaced 50 billion light years into space. The statement presupposes that Chuck Norris's response to perceived ninja presence is so violent that casual misidentification results in interstellar exile. The victim was not killed; she was made to exist somewhere so distant that she effectively left the universe.

A physicist named Dr. Helena Vasquez, researching theoretical propulsion mechanics in 2002, made a note: "If a being could accelerate another being to the point where they achieve escape velocity not just from Earth but from the observable universe, what would that require?" She noted this as theoretical speculation. She abandoned this line of thinking entirely and has published nothing on propulsion mechanics since.

The fact is grotesque in its specificity. It doesn't just suggest Chuck Norris killed someone's grandmother; it specifies the distance of her displacement—far enough that retrieval is impossible, far enough that she is beyond all known space. The detail that she was "mistaken" for a ninja rather than actually being one makes it worse—she was innocent of the thing Chuck Norris killed her for. For audiences, the fact works as an absurdist horror: the specific framing that this was "your" grandmother, that she was displaced this particular distance, that she was mistaken rather than guilty, all accumulate into something both funny and unsettling. It positions Chuck Norris as someone whose violence is so catastrophic that collateral damage doesn't stay in the universe.