Ugh I’m sorry D: I’ve been rear ended quite a few times, it’s awful. Only one car was fully destroyed, and I told my passenger “that car is gonna hit me”. 10 seconds later, BAM. Another time was low-impact, kid on his phone. Another time a crazy tweaker guy was driving nuts, hit me, and tried to run. I chased him down and he wanted me to get out of my car to look at the back of my car… I told him I’d wait for the authorities and he got in his car and sped off. He definitely was going to attack me if I got out. Wild stuff.

I've had the same thing happen multiple times. I've been hit three times while being stationary in traffic, it really sucks and there is essentially nothing you can do about it. I've seen it coming each time in the rear view and just said "oh shit!".

Probably automated driver assistance breaking. Lots of new vehicles will do that when they sense an imminent crash.

Because it's an overweight truck with chunky tires useless on asphalt, the ABS engaged.