[MetroMPG]

Here's another thing: Haggarty tester was driving on a smooth, flat runway.

Yet in one of the slo-mo clips near the end, you can see outside rear suspension (the side tucking under) beginning to load & unload while the car is oversteering. The back end is starting to bounce, with the opposite rear tire lifting off the ground. Throw in an uneven road surface that worsens the bounce, and it could be much more of a problem.