[thstone]

PSM shouldn't engage from hitting a regular shallow pot hole in the road because the car shouldn't rotate very much at all (I don't want to say zero but the amount of rotation due to a pot hole should be close to zero). The suspension should soak up that shallow pot hole and the car should continue forward in a straight line. PSM shouldn't engage until the yaw angle and tire rotation rates indicate that a slide is imminent. I don't think that you're getting close to the point of sliding the car so PSM shouldn't engage.

If you can feel some rotation after hitting a pot hole, it more likely means that the car is wallowing. That doesn't mean that its bouncing up and down like a stanced Honda Civic. What I am mean is much more nuanced and is characterized by a feeling of uncertainty in the forward direction of the car due to what should have been a vertical motion in the suspension being transferred into a diagonal chassis motion. You might feel this as induced yaw.

My 911SC did this. When I hit a bump or even a rise in the road at >80mph, the car felt like it was going in several directions at all once. In my case, new shocks and a proper alignment fixed it.

If this is the case, then the likely causes are worn suspension components, worn shock absorbers, wrong tire pressures, poor alignment, and worn tires.