Originally Posted by koala logs

Hmmm. Never did.

The brake pedal pulsating on the car I think happens to be the action of some primitive 90's era ABS (Anti-lock Braking Systems) because I ONLY experience those pulsating feedback when braking over loose surfaces like mud, sand, regardless of ambient temperatures OR when I'm using summer tires on wet roads and I'm skidding all over the road. It doesn't feel like a rotor warp but rather feels a lot like a mechanical feedback because it can feel pretty rough depending on the car model.

The pulsating seems to release the brakes intermittently and helps me steer when braking at the same time over loose surfaces. Before on 80's cars without ABS if I lock the front wheels, there's no way I can steer the car.