I was thinking more like

Your Tesla is updating. Please do not press the gas pedal or brake pedal. 17%

Right in the middle of I-280, of course.

Your Tesla will restart in 10... 9... 8...

You guys no doubt think you're being funny, but the way it actually works is like iOS devices: after the download, the car asks you when you'd like to install it, with 2am the next morning being the default. The installation can only take place if the car is stationary, parked, and off.

* The installation can only take place if the car is stationary, parked, and off.

this of course, only works when the patch isn't to fix the part where it detects if the car is stationary, parked and off.

That's right, it's a safety-critical piece of code, just like the software that controls the brakes and steering.