I haven't driven a newer car in a while, but not sure how it all interfaces. It almost certainly doesn't have a physical key, as cars seem to have moved away from that, and I'm not sure if you can turn off a new car while driving. There might be, ironically, fail-safes.

So, not sure if the driver panicked in the moment and also screwed up here, or if there was really really nothing he could do.

Either way, seems like a huge issue from the car, as not everyone can be expected to react quickly and rationally, and, cars clearly aren't supposed to do that.