Blaine The Mono (The Dark Tower III)
I’m not sure what it is with Stephen King and killer automobiles (Christine, Maximum Overdrive), but I would argue that Blaine is the most terrifying automobile he has ever dreamed up. Poor Blaine is a monorail that went insane and then suicidal as he attempted to kill lead character Roland Deschain in his suicide attempt. Luckily, he survived by beating Blaine in a riddling contest, of all things.
