Earlier quoted context omitted.
Yep yep yep.. that explains it. Not the software fault as I original suspected (at least in the break-jamming case). What I "felt" like jammed was probably just that vacuum system not helping, but since it happened for the first time (with me), and so abruptly, it felt like the brakes were jammed. But, the worrying, and a lot more scarier part is that this was not me accidentally leaving the car in accessory/power-on…
So I researched a bit more on that break thingy... and just learned that this assist provides anywhere form 4x to 10x the assist. And without it, you would literally have to stand on the breaks with full body weight to have a similar effect. Wow!!
...ooh, a mnemonic: "STOMP, STAY and STEER". (Stomp brake, Stay stomped, Steer around obstacles while pressing brake hard.) Even if it vibrates!
[Grand]pa had to "pump" his brakes (on/off/on/off), we have it easier :)