I have provided a few examples of what i am talking about. From my understanding, when the person lifts off the gas while in a corner at higher speeds than usual pushing the usual limit, the weight shifts from the rear to the front, thus causing a weightlessness in the rear which then causes the rear to slide out. Correct me if i am wrong, you seem like you've had some great driving experience.

https://www.youtube.com/watch?v=i57ZP4XL6sQ

https://www.youtube.com/watch?v=cdM9s5w4-5M