It’s weird, and almost a bit funny. For a brief moment.

The first smashing can be felt more than heard, a subsonic strike something like a vast drumhead being struck with a metre-wide mallet, but so quick, you barely even notice it until it’s over. The second one, however, isn’t far behind, and it’s a bit louder. That second thump gives away its location — whatever it was seems to be happening quite close by — in the direction of the parking structure.

At just this moment a car cruises through the pick-up zone at full speed, barreling along at least 100 kmh. It’s only because of some very fast reactions that no one gets hurt as it passes by. As it zooms past, you notice there’s no one behind the wheel.

Before you have any time to process that, another huge thump nearby causes a section of the barrier wall of an upper floor of the concrete parking structure to shear off. A pile of rubble falls to the ground not very far away from you.

-- Mark Pesce, Oct 2015, https://medium.com/@mpesce/the-great-hack-part-one-attack-70...

But you know eventually someone will do a big over the air firmware update and brick a couple of hundred cars. This is almost certain to happen eventually.

There has already been a proof-of-concept hack of a vehicle: Hackers Remotely Attack a Jeep on the Highway. [0]

(Incidentally, I applaud the top comment at [0]. Everyone involved in recklessly demonstrating the hack on public roads, should have faced serious consequences. As far as I can tell though, nothing came from the police report.)

[0] https://news.ycombinator.com/item?id=9921557

I was momentarily confused when I parsed that sentence as referring to the Toyota Mirai: https://en.wikipedia.org/wiki/Toyota_Mirai

Relevant sci-fi: Daemon, by Daniel Suarez.

(AI-controlled cars feature prominently as weapons.)