The Phantom

On a nationwide broadcast, a man kills an innocent civilian, directly in front of a police station, with officers bearing witness. He tells them to stand down, and let him go, and the world watches in shock as they do so. A woman is assaulted in a gas station, but with a single scream, kills the assailant, and wipes the memory of the cashier. The media has no explanation for the events, and the only one that some can come up with is the supernatural.
David watches in horror, and utter confusion as strange and unexplainable events continue to arise, though also concerned for himself, as the voice inside his head becomes louder, narrating his every move. He continues to stand by, observing each of these destructive and impossible events, until eventually, the voice begins to dictate his life, forcing him to take action.