LMAO, ROTFL and all that.
At the thought of "Siri, brake now.. and it does. Full emergency brake with anchors and handbrake for good measure, resulting in a faceplant.
I had something similar happen with a previous car, for no apparent reason it decided at 25 mph to slam into REVERSE resulting in a horrible sound of mashing gears and more lights than NCC-1701 escaping from the Romulans appearing on the dashboard, the likes of which I've never seen before or since.
Then it stalled in the middle of the (*&*(^!£ING ROAD and wouldn't start, later discovered this little beauty was caused by a faulty internally shorted 12V battery causing the automatic controller to throw a wobbly and lose power unexpectedly.
Needless to say it got sold on with a new battery and a polite note to get the thing nuke and paved at a proper garage with a diagnostic computer.