There was a fellow here on FR last week that had a runaway 2002 Toyota. He managed to get it stopped. After which he traded it off and told the dealer his experience. The dealer poo-pooed it off and sold the car to a friend of his. Not long after that it happened again and the car got totaled.
True or fabricated story? I don’t know.
I actually assume some of these stories are true. I will say this though: The dealer was so confident that he sold the car to a friend. It means he probably was sincere.
I had a throttle stick on a car a few decades ago because of a broken motor mount. I’d forgotten all about it until someone here mentioned it had happened to them. I also had a floor mat block my pedal. Actually, that has happened lots of times, never seriously though.
With many millions of cars out there, all sorts of glitches, often due to simple defective parts, will show up. You try to get to “five nines” perfection (99.999%) but you never reach 100%.