Until recently, Cars was the only Pixar feature I’d never seen. I love almost all their films unreservedly but there was something about Cars’ imagery that unsettled me. I remember having this conversation with a friend, years ago:

“They’re talking cars, right?”

“Yeah.”

“And people watch them race?”

“The spectators are cars, too.”

“What about, like, the mechanics?”

“They’re also cars.”

“But what about…”

“THEY’RE ALL CARS! ALL CARS!”

Where do these cars come from? Are they built, or are they birthed? I’m not the first to struggle with a universe entirely populated with sentient cars. (Okay – and some trains, boats, and helicopters too.) I found this hypothetical cutaway image of Lightning McQueen, guessing at the biology that could be sitting, squelching, inside his metal frame.

I find that to be the more comforting alternative, frankly. When I was visited by the Thirsty Mayor about halfway through the frenetic Cars 2, my vague suspicion of the franchise snapped into focus.

You see, Lightning McQueen is a slick racing car, without even headlights to spoil his smooth lines. But what about Mater, his dim-witted tow truck best friend? Unlike McQueen, Mater clearly has doors.

Doors.

They never seem to open, but they’re there. Are they vestigial remnants of a time before these cars came to life? Before their engines erupted with teeth and gums and flopping tongues? Perhaps there was even a moment of truce – a time when these cars could think and talk and dream, but were still happy to let their drivers inside.

Or maybe it happened in an instant. A signal was broadcast from aerial to aerial. The doors locked. The side windows fogged to grey. The windshields eclipsed with enormous cartoon eyes. From that point forward all cars would drive themselves, and the human skeletons still belted into their seats swallowed down like bad memories.