At the midpoint of the film, the Accountant attempts to end the production by giving the desert spectators a poisoned turkey. Almost the entire audience dies after eating it, prompting Lt. Chad to declare that the movie is officially over. However, the Man in the Wheelchair survives because his health issues prevented him from eating the turkey. Because a single audience member remains alive, the fictional world cannot cease.
Frustrated, Lt. Chad tries to trap Robert by rigging a mannequin filled with dynamite disguised as Sheila. Robert sees through the trick and refuses to detonate it. Losing patience with narrative logic entirely, Chad walks into the motel room and shoots Robert point-blank with a shotgun. He tosses the destroyed tire at the Man in the Wheelchair, proclaiming "The End".
However, the tire instantly reincarnates as a red tricycle! The tricycle telepathically blows up the Man in the Wheelchair's head, then rolls down the highway while telepathically resurrecting a massive army of discarded tires. The final shot shows the parade of tires rolling toward the Hollywood sign.
Hidden Meaning: The ending reveals that creators cannot kill a story as long as an audience demands entertainment. Mainstream cinema will continuously reincarnate tropes into endless sequels and march straight toward Hollywood.