Please answer the following question: Build a movie plot around this: What did David show Arnie in the backseat of his car? An empty cage.
A:
David Wong recalls confronting a zombie skinhead whom he beheaded one year prior and wonders whether an axe that had its handle and head replaced over time is still the same axe. This is a play on the classic problem in philosophy and metaphysics known as the Ship of Theseus. He sits in a restaurant and recounts his story to reporter Arnie Blondestone.David is at a party with his friend John. He and Fred Chu witness Justin White teasing Amy Sullivan, who has an amputated hand. David learns that Amy's dog, Bark Lee, has gone missing after biting a drug dealer named Robert Marley. As he leaves the party, David sees Bark next to his car, then suddenly feels sick and drives home. That night, David receives a frantic call from John, who seems delusional. At John's apartment, David recovers a syringe containing a black substance, oblivious to a bizarre creature only John can see. John tells David that the drug "Soy Sauce", given to him by Marley, causes him to slip in and out of the timeline and lets him perceive alternate dimensions. David then receives a call from John of the past.As they drive off, David is accidentally stabbed by the syringe. The drug, which David notices is quivering like an organism, causes severe hallucination. An alien, Roger North, appears in the backseat, but retreats when David threatens him. Detective Lawrence Appleton takes John and David to the police station. As he is interrogated, David realizes that he can somehow predict Appleton's questions. Appleton reveals that John and White are the only survivors of a drug party at Marley's trailer. After being called out of the room, Appleton tells David that John has died and leaves. Arnie interrupts Dave's story, expressing his skepticism about the events. Dave then takes Arnie out to his car and shows him an empty cage in the back seat. When glimpsing at the cage from the corner of his eye, Arnie is able to see the same bizarre creature from John's apartment inside the cage. Dave convinces Arnie to listen to the rest of the story...